Selective antisense compounds and uses thereof

ABSTRACT

The present invention provides oligomeric compounds. Certain such oligomeric compounds are useful for hybridizing to a complementary nucleic acid, including but not limited, to nucleic acids in a cell. In certain embodiments, hybridization results in modulation of the amount, activity, or expression of the target nucleic acid in a cell. In certain embodiments, hybridization results in selective modulation of the amount, activity, or expression of a target Huntingtin gene or Huntingtin transcript in a cell.

SEQUENCE LISTING

The present application is being filed along with a Sequence Listing in electronic format. The Sequence Listing is provided as a file entitled CORE0109USC1SEQ.txt, created Mar. 23, 2017, which is 392 Kb in size. The information in the electronic format of the sequence listing is incorporated herein by reference in its entirety.

BACKGROUND

Antisense compounds have been used to modulate target nucleic acids. Antisense compounds comprising a variety of chemical modifications and motifs have been reported. In certain instances, such compounds are useful as research tools, diagnostic reagents, and as therapeutic agents. In certain instances antisense compounds have been shown to modulate protein expression by binding to a target messenger RNA (mRNA) encoding the protein. In certain instances, such binding of an antisense compound to its target mRNA results in cleavage of the mRNA. Antisense compounds that modulate processing of a pre-mRNA have also been reported. Such antisense compounds alter splicing, interfere with polyadenlyation or prevent formation of the 5′-cap of a pre-mRNA.

SUMMARY

In certain embodiments, the present invention provides oligomeric compounds comprising oligonucleotides. In certain embodiments, such oligonucleotides comprise a region having a gapmer motif. In certain embodiments, such oligonucleotides consist of a region having a gapmer motif.

The present disclosure provides the following non-limiting numbered embodiments:

Embodiment 1

A compound comprising a modified oligonucleotide consisting of 12 to 30 linked nucleosides, wherein the linked nucleosides comprise at least 8 contiguous nucleobases of a nucleobase sequence recited in SEQ ID NO: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, or 174-573.

Embodiment 2

The compound of embodiment 1, wherein the modified oligonucleotide comprises at least 10 contiguous nucleobases of a nucleobase sequence recited in SEQ ID NO: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, or 174-573.

Embodiment 3

The compound of embodiment 1, wherein the modified oligonucleotide comprises at least 12 contiguous nucleobases of a nucleobase sequence recited in SEQ ID NO: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, or 174-573.

Embodiment 4

The compound of embodiment 1, wherein the modified oligonucleotide comprises at least 14 contiguous nucleobases of a nucleobase sequence recited in SEQ ID NO: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, or 174-573.

Embodiment 5

The compound of embodiment 1, wherein the modified oligonucleotide comprises at least 16 contiguous nucleobases of a nucleobase sequence recited in SEQ ID NO: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, or 174-573.

Embodiment 6

The compound of embodiment 1, wherein the modified oligonucleotide comprises a nucleobase sequence selected from among SEQ ID NO: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, or 174-573.

Embodiment 7

The compound of embodiment 1, wherein the modified oligonucleotide consists of a nucleobase sequence selected from among SEQ ID NO: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, or 174-573.

Embodiment 8

The compound of any of embodiments 1 to 7, wherein the modified oligonucleotide consists of 14 to 26 linked nucleosides.

Embodiment 9

The compound of any of embodiments 1 to 7, wherein the modified oligonucleotide consists of 15 to 25 linked nucleosides.

Embodiment 10

The compound of any of embodiments 1 to 7, wherein the modified oligonucleotide consists of 16 to 25 linked nucleosides.

Embodiment 11

The compound of any of embodiments 1 to 7, wherein the modified oligonucleotide consists of 17 to 25 linked nucleosides.

Embodiment 12

The compound of any of embodiments 1 to 7, wherein the modified oligonucleotide consists of 15 to 22 linked nucleosides.

Embodiment 13

The compound of any of embodiments 1 to 7, wherein the modified oligonucleotide consists of 15 to 20 linked nucleosides.

Embodiment 14

The compound of any of embodiments 1 to 7, wherein the modified oligonucleotide consists of 16 to 20 linked nucleosides.

Embodiment 15

The compound of any of embodiments 1 to 7, wherein the modified oligonucleotide consists of 14 linked nucleosides.

Embodiment 16

The compound of any of embodiments 1 to 7, wherein the modified oligonucleotide consists of 15 linked nucleosides.

Embodiment 17

The compound of any of embodiments 1 to 7, wherein the modified oligonucleotide consists of 16 linked nucleosides.

Embodiment 18

The compound of any of embodiments 1 to 7, wherein the modified oligonucleotide consists of 17 linked nucleosides.

Embodiment 19

The compound of any of embodiments 1 to 7, wherein the modified oligonucleotide consists of 18 linked nucleosides.

Embodiment 20

The compound of any of embodiments 1 to 7, wherein the modified oligonucleotide consists of 19 linked nucleosides.

Embodiment 21

The compound of any of embodiments 1 to 7, wherein the modified oligonucleotide consists of 20 linked nucleosides.

Embodiment 22

The compound of any of embodiments 1 to 7, wherein the modified oligonucleotide consists of 21 linked nucleosides.

Embodiment 23

The compound of any of embodiments 1 to 7, wherein the modified oligonucleotide consists of 22 linked nucleosides.

Embodiment 24

The compound of any of embodiments 1 to 23, wherein the nucleobase sequence of the modified oligonucleotide is 90% complementary to SEQ ID NO. 1.

Embodiment 25

The compound of any of embodiments 1 to 23, wherein the nucleobase sequence of the modified oligonucleotide is 95% complementary to SEQ ID NO. 1.

Embodiment 26

The compound of any of embodiments 1 to 23, wherein the nucleobase sequence of the modified oligonucleotide is 100% complementary to SEQ ID NO. 1.

Embodiment 27

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeedk-d7-keee motif.

Embodiment 28

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeedk-d7-eeee motif.

Embodiment 29

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeedk-d7-keee motif.

Embodiment 30

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeedk-d7-kkee motif

Embodiment 31

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeee-d9-eeeee motif.

Embodiment 32

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeeedk-d7-eeeee motif.

Embodiment 33

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeeeeeek-d7-eee motif.

Embodiment 34

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeeeeek-d7-eeee motif.

Embodiment 35

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeeek-d7-eee motif.

Embodiment 36

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeeek-d7-eeeeee motif.

Embodiment 37

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeeek-d7-kee motif.

Embodiment 38

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeeek-d7-kke motif.

Embodiment 39

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeek-d7-eeee motif.

Embodiment 40

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeek-d7-eeeeeee motif.

Embodiment 41

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeek-d7-keee motif.

Embodiment 42

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeek-d7-keeee motif

Embodiment 43

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeek-d7-kke motif.

Embodiment 44

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeek-d7-kkee motif.

Embodiment 45

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeekk-d3-k-d3-keke motif.

Embodiment 46

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeekk-d7-kee motif.

Embodiment 47

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeekk-d7-keke motif.

Embodiment 48

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeekk-d7-kke motif

Embodiment 49

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeeekk-d7-kkee motif

Embodiment 50

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeek-d7-eeeeeeee motif.

Embodiment 51

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeek-d7-keeeee motif.

Embodiment 52

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeek-d7-kkee motif.

Embodiment 53

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeek-d7-kkeee motif.

Embodiment 54

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeek-d8-kee motif

Embodiment 55

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeek-d9-keee motif.

Embodiment 56

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeek-d9-keke motif.

Embodiment 57

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeekk-d7-eeee motif.

Embodiment 58

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeekk-d7-keee motif.

Embodiment 59

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeekk-d7-kke motif.

Embodiment 60

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeekk-d7-kkee motif

Embodiment 61

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eeekk-d7-kkeee motif

Embodiment 62

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eek-d7-eeeeeeeee motif.

Embodiment 63

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eek-d7-keeeeee motif.

Embodiment 64

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eek-d7-kkeee motif.

Embodiment 65

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eek-d8-kkee motif.

Embodiment 66

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eekk-d8-kee motif.

Embodiment 67

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eekk-d8-kkee motif.

Embodiment 68

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an eekk-d8-kkeee motif.

Embodiment 69

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ek-d7-eeeeeeeeee motif.

Embodiment 70

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ek-d8-kkeee motif.

Embodiment 71

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ek-d9-kkke motif.

Embodiment 72

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ekek-d6-k-dd-keke motif

Embodiment 73

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ekek-d8-kkeke motif.

Embodiment 74

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ekek-d9-keee motif.

Embodiment 75

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ekek-d9-keke motif.

Embodiment 76

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ekekek-d7-keke motif.

Embodiment 77

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ekekk-d8-keke motif.

Embodiment 78

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ekk-d7-kkeee motif.

Embodiment 79

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ekk-d7-kkeeeee motif.

Embodiment 80

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ekk-d8-kkee motif.

Embodiment 81

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ekk-d8-kkeee motif.

Embodiment 82

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ekk-d8-kkeeee motif.

Embodiment 83

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ekk-d8-kkke motif.

Embodiment 84

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ekk-d9-kke motif

Embodiment 85

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ekkdk-d7-kke motif.

Embodiment 86

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ekkk-d8-kke motif.

Embodiment 87

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ekkk-d9-ke motif.

Embodiment 88

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ekkkk-d7-kke motif.

Embodiment 89

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has an ekkkk-d7-kkke motif.

Embodiment 90

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a kkekk-d9-kkekk motif.

Embodiment 91

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a kkkkk-d7-kkkkk motif.

Embodiment 92

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekkdk-d7-kke motif.

Embodiment 93

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekek-d8-kekee motif.

Embodiment 94

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-f-d8-kke motif.

Embodiment 95

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-z-d8-kke motif.

Embodiment 96

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-h-d8-kke motif

Embodiment 97

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-d2-h-d6-kke motif.

Embodiment 98

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-d-h-d7-kke motif.

Embodiment 99

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-d3-f-d5-kke motif.

Embodiment 100

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-d3-z-d5-kke motif.

Embodiment 101

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-d3-h-d5-kke motif.

Embodiment 102

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-d4-h-d4-kke motif.

Embodiment 103

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-d5-f-d3-kke motif.

Embodiment 104

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-d5-z-d3-kke motif.

Embodiment 105

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-d5-h-d3-kke motif.

Embodiment 106

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-d6-f-d2-kke motif.

Embodiment 107

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-d6-z-d2-kke motif.

Embodiment 108

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-d6-h-d2-kke motif.

Embodiment 109

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-d7-f-d-kke motif.

Embodiment 110

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-d7-z-d-kke motif.

Embodiment 111

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-d7-h-d-kke motif.

Embodiment 112

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-d8-f-dkke motif.

Embodiment 113

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-d8-z-kke motif.

Embodiment 114

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-d8-h-kke motif.

Embodiment 115

The compound of any of embodiments 1 to 26, wherein the oligonucleotide has a ekk-d9-kke motif

Embodiment 116

The oligomeric compound of any of embodiments 1 to 115 comprising at least one modified internucleoside linkage.

Embodiment 117

The oligomeric compound of embodiment 116, wherein each internucleoside linkage is a modified internucleoside linkage.

Embodiment 118

The oligomeric compound of embodiment 115 or 116 comprising at least one phosphorothioate internucleoside linkage.

Embodiment 119

The oligomeric compound of embodiment 117 wherein each internucleoside linkage is a phosphorothioate internucleoside linkage.

Embodiment 120

The oligomeric compound of any of embodiments 1 to 119 comprising at least one methylphosphonate internucleoside linkage.

Embodiment 121

The oligomeric compound of any of embodiments 1 to 119 comprising one methylphosphonate internucleoside linkage.

Embodiment 122

The oligomeric compound of any of embodiments 1 to 120 comprising two methylphosphonate internucleoside linkages.

Embodiment 123

The oligomeric compound of any of embodiments 1 to 120 comprising at least one modified nucleobase.

Embodiment 124

The oligomeric compound of embodiment 123, comprising at least one 2-thio-thymidine.

Embodiment 125

The oligomeric compound of embodiment 1, having an eeeekk-d7-kke motif and consisting of the nucleobase sequence of SEQ ID NO.: 24.

Embodiment 126

The oligomeric compound of any of embodiments 1 to 119 comprising at least one 5′-Me-DNA modification.

Embodiment 127

The oligomeric compound of any of embodiments 1 to 119 comprising one 5′-Me-DNA modification.

Embodiment 128

The oligomeric compound of embodiment 126 or 127, wherein the 5′-Me-DNA modification is an S-5′-Me-DNA.

Embodiment 129

The oligomeric compound of embodiment 126 or 127, wherein the 5′-Me-DNA modification is an R-5′-Me-DNA.

Embodiment 130

The oligomeric compound of any of embodiments 126 to 129, wherein the 5′-Me-DNA modification is at position 6 from the 5′-end.

Embodiment 131

The oligomeric compound of any of embodiments 126 to 129, wherein the 5′-Me-DNA modification is at position 7 from the 5′-end.

Embodiment 132

The oligomeric compound of any of embodiments 126 to 129, consisting of the nucleobase sequence of SEQ ID NO.: 3.

Embodiment 133

The oligomeric compound of any of embodiments 1 to 132, having an EC50 for reduction of expression of target that is at least two-fold lower than its EC50 for reduction of expression of the non-target, when measured in cells.

Embodiment 134

The oligomeric compound of any of embodiments 1 to 132, having an ED₅₀ for reduction of expression of target that is at least two-fold lower than its ED₅₀ for reduction of expression of the non-target, when measured in an animal.

Embodiment 135

A compound consisting of ISIS 572772.

Embodiment 136

A pharmaceutical composition comprising an oligomeric compound of any of embodiments 1-135 and a pharmaceutically acceptable carrier or diluent.

Embodiment 137

A method comprising contacting a cell with an oligomeric compound of any of embodiments 1-136.

Embodiment 138

The method of embodiment 137, wherein the cell is in vitro.

Embodiment 139

The method of embodiment 137, wherein the cell is in an animal.

Embodiment 140

The method of embodiment 137, wherein the animal is a human.

Embodiment 141

The method of embodiment 137, wherein the animal is a mouse.

Embodiment 142

A method of administering a pharmaceutical composition of embodiment 136 to an animal.

Embodiment 143

The method of embodiment 142, wherein the animal is a human.

Embodiment 144

The method of embodiment 143, wherein the animal is a mouse.

Embodiment 145

Use of an oligomeric compound of any of embodiments 1-136 for the preparation of a medicament for the treatment or amelioration of Huntington's disease.

Embodiment 146

A method of ameliorating a symptom of Huntington's disease, comprising administering an oligomeric compound of any of embodiments 1-136 to an animal in need thereof.

Embodiment 147

The method of embodiment 146, wherein the animal is a human.

Embodiment 148

The method of embodiment 147, wherein the animal is a mouse.

Embodiment 149

A method for reducing the rate of progression of a symptom associated with Huntington's Disease, comprising administering to a human in need thereof a compound of any of embodiments 1-136, and thereby reducing the rate of progression a symptom of Huntington's disease in the human.

Embodiment 150

A method for reversing degeneration indicated by a symptom associated with Huntington's disease, comprising administering to a human in need thereof a compound of any of embodiments 1-136, and thereby reversing degeneration indicated by a symptom of Huntington's disease in the human.

Embodiment 151

A method for treating a human with Huntington's disease comprising identifying the human with the disease and administering to the human a therapeutically effective amount of the compound of any of embodiments 1-136.

Embodiment 152

The method of embodiment 149, wherein the treatment reduces at least one of restlessness, lack of coordination, unintentionally initiated motions, unintentionally uncompleted motions, unsteady gait, chorea, rigidity, writhing motions, abnormal posturing, instability, abnormal facial expressions, difficulty chewing, difficulty swallowing, difficulty speaking, seizure, sleep disturbances, impaired planning, impaired flexibility, impaired abstract thinking, impaired rule acquisition, impaired initiation of appropriate actions, impaired inhibition of inappropriate actions, impaired short-term memory, impaired long-term memory, paranoia, disorientation, confusion, hallucination, dementia, a anxiety, depression, blunted affect, egocentrisms, aggression, compulsive behavior, irritability, suicidal ideation, reduced brain mass, muscle atrophy, cardiac failure, impaired glucose tolerance, weight loss, osteoporosis, and testicular atrophy in the human.

Embodiment 153

A method for reducing the rate of progression of a symptom associated with Huntington's Disease, comprising administering to a human in need thereof ISIS 572772, and thereby reducing the rate of progression a symptom of Huntington's disease in the human.

Embodiment 154

A method for reversing degeneration indicated by a symptom associated with Huntington's disease, comprising administering to a human in need thereof ISIS 572772, and thereby reversing degeneration indicated by a symptom of Huntington's disease in the human.

Embodiment 155

A method for treating a human with Huntington's disease comprising identifying the human with the disease and administering to the human a therapeutically effective amount of ISIS 572772.

Embodiment 156

The method of embodiment 153, wherein the treatment reduces at least one of restlessness, lack of coordination, unintentionally initiated motions, unintentionally uncompleted motions, unsteady gait, chorea, rigidity, writhing motions, abnormal posturing, instability, abnormal facial expressions, difficulty chewing, difficulty swallowing, difficulty speaking, seizure, sleep disturbances, impaired planning, impaired flexibility, impaired abstract thinking, impaired rule acquisition, impaired initiation of appropriate actions, impaired inhibition of inappropriate actions, impaired short-term memory, impaired long-term memory, paranoia, disorientation, confusion, hallucination, dementia, a anxiety, depression, blunted affect, egocentrisms, aggression, compulsive behavior, irritability, suicidal ideation, reduced brain mass, muscle atrophy, cardiac failure, impaired glucose tolerance, weight loss, osteoporosis, and testicular atrophy in the human.

DETAILED DESCRIPTION

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed. Herein, the use of the singular includes the plural unless specifically stated otherwise. As used herein, the use of “or” means “and/or” unless stated otherwise. Furthermore, the use of the term “including” as well as other forms, such as “includes” and “included”, is not limiting. Also, terms such as “element” or “component” encompass both elements and components comprising one unit and elements and components that comprise more than one subunit, unless specifically stated otherwise.

The section headings used herein are for organizational purposes only and are not to be construed as limiting the subject matter described. All documents, or portions of documents, cited in this application, including, but not limited to, patents, patent applications, articles, books, and treatises, are hereby expressly incorporated by reference in their entirety for any purpose.

A. Definitions

Unless specific definitions are provided, the nomenclature used in connection with, and the procedures and techniques of, analytical chemistry, synthetic organic chemistry, and medicinal and pharmaceutical chemistry described herein are those well known and commonly used in the art. Standard techniques may be used for chemical synthesis, and chemical analysis. Certain such techniques and procedures may be found for example in “Carbohydrate Modifications in Antisense Research” Edited by Sangvi and Cook, American Chemical Society, Washington D.C., 1994; “Remington's Pharmaceutical Sciences,” Mack Publishing Co., Easton, Pa., 21^(st) edition, 2005; and “Antisense Drug Technology, Principles, Strategies, and Applications” Edited by Stanley T. Crooke, CRC Press, Boca Raton, Fla.; and Sambrook et al., “Molecular Cloning, A laboratory Manual,” 2^(nd) Edition, Cold Spring Harbor Laboratory Press, 1989, which are hereby incorporated by reference for any purpose. Where permitted, all patents, applications, published applications and other publications and other data referred to throughout in the disclosure are incorporated by reference herein in their entirety.

Unless otherwise indicated, the following terms have the following meanings:

As used herein, “nucleoside” means a compound comprising a nucleobase moiety and a sugar moiety. Nucleosides include, but are not limited to, naturally occurring nucleosides (as found in DNA and RNA) and modified nucleosides. Nucleosides may be linked to a phosphate moiety.

As used herein, “chemical modification” means a chemical difference in a compound when compared to a naturally occurring counterpart. Chemical modifications of oligonucleotides include nucleoside modifications (including sugar moiety modifications and nucleobase modifications) and internucleoside linkage modifications. In reference to an oligonucleotide, chemical modification does not include differences only in nucleobase sequence.

As used herein, “furanosyl” means a structure comprising a 5-membered ring comprising four carbon atoms and one oxygen atom.

As used herein, “naturally occurring sugar moiety” means a ribofuranosyl as found in naturally occurring RNA or a deoxyribofuranosyl as found in naturally occurring DNA.

As used herein, “sugar moiety” means a naturally occurring sugar moiety or a modified sugar moiety of a nucleoside.

As used herein, “modified sugar moiety” means a substituted sugar moiety or a sugar surrogate.

As used herein, “substituted sugar moiety” means a furanosyl that is not a naturally occurring sugar moiety. Substituted sugar moieties include, but are not limited to furanosyl comprising substituents at the 2′-position, the 3′-position, the 5′-position and/or the 4′-position. Certain substituted sugar moieties are bicyclic sugar moieties.

As used herein, “2′-substituted sugar moiety” means a furanosyl comprising a substituent at the 2′-position other than H or OH. Unless otherwise indicated, a 2′-substituted sugar moiety is not a bicyclic sugar moiety (i.e., the 2′-substituent of a 2′-substituted sugar moiety does not form a bridge to another atom of the furanosyl ring.

As used herein, “MOE” means —OCH₂CH₂OCH₃.

As used herein, “2′-F nucleoside” refers to a nucleoside comprising a sugar comprising fluoroine at the 2′ position. Unless otherwise indicated, the fluorine in a 2′-F nucleoside is in the ribo position (replacing the OH of a natural ribose).

As used herein, “2′-(ara)-F” refers to a 2′-F substituted nucleoside, wherein the fluoro group is in the arabino position.

As used herein the term “sugar surrogate” means a structure that does not comprise a furanosyl and that is capable of replacing the naturally occurring sugar moiety of a nucleoside, such that the resulting nucleoside sub-units are capable of linking together and/or linking to other nucleosides to form an oligomeric compound which is capable of hybridizing to a complementary oligomeric compound. Such structures include rings comprising a different number of atoms than furanosyl (e.g., 4, 6, or 7-membered rings); replacement of the oxygen of a furanosyl with a non-oxygen atom (e.g., carbon, sulfur, or nitrogen); or both a change in the number of atoms and a replacement of the oxygen. Such structures may also comprise substitutions corresponding to those described for substituted sugar moieties (e.g., 6-membered carbocyclic bicyclic sugar surrogates optionally comprising additional substituents). Sugar surrogates also include more complex sugar replacements (e.g., the non-ring systems of peptide nucleic acid). Sugar surrogates include without limitation morpholinos, cyclohexenyls and cyclohexitols.

As used herein, “bicyclic sugar moiety” means a modified sugar moiety comprising a 4 to 7 membered ring (including but not limited to a furanosyl) comprising a bridge connecting two atoms of the 4 to 7 membered ring to form a second ring, resulting in a bicyclic structure. In certain embodiments, the 4 to 7 membered ring is a sugar ring. In certain embodiments the 4 to 7 membered ring is a furanosyl. In certain such embodiments, the bridge connects the 2′-carbon and the 4′-carbon of the furanosyl.

As used herein, “nucleotide” means a nucleoside further comprising a phosphate linking group. As used herein, “linked nucleosides” may or may not be linked by phosphate linkages and thus includes, but is not limited to “linked nucleotides.” As used herein, “linked nucleosides” are nucleosides that are connected in a continuous sequence (i.e. no additional nucleosides are present between those that are linked).

As used herein, “nucleobase” means a group of atoms that can be linked to a sugar moiety to create a nucleoside that is capable of incorporation into an oligonucleotide, and wherein the group of atoms is capable of bonding with a complementary naturally occurring nucleobase of another oligonucleotide or nucleic acid. Nucleobases may be naturally occurring or may be modified.

As used herein the terms, “unmodified nucleobase” or “naturally occurring nucleobase” means the naturally occurring heterocyclic nucleobases of RNA or DNA: the purine bases adenine (A) and guanine (G), and the pyrimidine bases thymine (T), cytosine (C) (including 5-methyl C), and uracil (U).

As used herein, “modified nucleobase” means any nucleobase that is not a naturally occurring nucleobase.

As used herein, “modified nucleoside” means a nucleoside comprising at least one chemical modification compared to naturally occurring RNA or DNA nucleosides. Modified nucleosides comprise a modified sugar moiety and/or a modified nucleobase.

As used herein, “bicyclic nucleoside” or “BNA” means a nucleoside comprising a bicyclic sugar moiety.

As used herein, “constrained ethyl nucleoside” or “cEt” means a nucleoside comprising a bicyclic sugar moiety comprising a 4′-CH(CH₃)—O-2′ bridge.

As used herein, “locked nucleic acid nucleoside” or “LNA” means a nucleoside comprising a bicyclic sugar moiety comprising a 4′-CH₂—O-2′ bridge.

As used herein, “2′-substituted nucleoside” means a nucleoside comprising a substituent at the 2′-position other than H or OH. Unless otherwise indicated, a 2′-substituted nucleoside is not a bicyclic nucleoside.

As used herein, “2′-deoxynucleoside” means a nucleoside comprising 2′-H furanosyl sugar moiety, as found in naturally occurring deoxyribonucleosides (DNA). In certain embodiments, a 2′-deoxynucleoside may comprise a modified nucleobase or may comprise an RNA nucleobase (e.g., uracil).

As used herein, “RNA-like nucleoside” means a modified nucleoside that adopts a northern configuration and functions like RNA when incorporated into an oligonucleotide. RNA-like nucleosides include, but are not limited to 3′-endo furanosyl nucleosides and RNA surrogates.

As used herein, “3′-endo-furanosyl nucleoside” means an RNA-like nucleoside that comprises a substituted sugar moiety that has a 3′-endo conformation. 3′-endo-furanosyl nucleosides include, but are not limitied to: 2′-MOE, 2′-F, 2′-OMe, LNA, ENA, and cEt nucleosides.

As used herein, “RNA-surrogate nucleoside” means an RNA-like nucleoside that does not comprise a furanosyl. RNA-surrogate nucleosides include, but are not limited to hexitols and cyclopentanes.

As used herein, “oligonucleotide” means a compound comprising a plurality of linked nucleosides. In certain embodiments, an oligonucleotide comprises one or more unmodified ribonucleosides (RNA) and/or unmodified deoxyribonucleosides (DNA) and/or one or more modified nucleosides.

As used herein “oligonucleoside” means an oligonucleotide in which none of the internucleoside linkages contains a phosphorus atom. As used herein, oligonucleotides include oligonucleosides.

As used herein, “modified oligonucleotide” means an oligonucleotide comprising at least one modified nucleoside and/or at least one modified internucleoside linkage.

As used herein “internucleoside linkage” means a covalent linkage between adjacent nucleosides in an oligonucleotide.

As used herein “naturally occurring internucleoside linkage” means a 3′ to 5′ phosphodiester linkage.

As used herein, “modified internucleoside linkage” means any internucleoside linkage other than a naturally occurring internucleoside linkage.

As used herein, “oligomeric compound” means a polymeric structure comprising two or more sub-structures. In certain embodiments, an oligomeric compound comprises an oligonucleotide. In certain embodiments, an oligomeric compound comprises one or more conjugate groups and/or terminal groups. In certain embodiments, an oligomeric compound consists of an oligonucleotide.

As used herein, “terminal group” means one or more atom attached to either, or both, the 3′ end or the 5′ end of an oligonucleotide. In certain embodiments a terminal group is a conjugate group. In certain embodiments, a terminal group comprises one or more terminal group nucleosides.

As used herein, “conjugate” means an atom or group of atoms bound to an oligonucleotide or oligomeric compound. In general, conjugate groups modify one or more properties of the compound to which they are attached, including, but not limited to pharmacodynamic, pharmacokinetic, binding, absorption, cellular distribution, cellular uptake, charge and/or clearance properties.

As used herein, “conjugate linking group” means any atom or group of atoms used to attach a conjugate to an oligonucleotide or oligomeric compound.

As used herein, “antisense compound” means a compound comprising or consisting of an oligonucleotide at least a portion of which is complementary to a target nucleic acid to which it is capable of hybridizing, resulting in at least one antisense activity.

As used herein, “antisense activity” means any detectable and/or measurable change attributable to the hybridization of an antisense compound to its target nucleic acid.

As used herein, “detecting” or “measuring” means that a test or assay for detecting or measuring is performed. Such detection and/or measuring may result in a value of zero. Thus, if a test for detection or measuring results in a finding of no activity (activity of zero), the step of detecting or measuring the activity has nevertheless been performed.

As used herein, “detectable and/or measurable activity” means a measurable activity that is not zero.

As used herein, “essentially unchanged” means little or no change in a particular parameter, particularly relative to another parameter which changes much more. In certain embodiments, a parameter is essentially unchanged when it changes less than 5%. In certain embodiments, a parameter is essentially unchanged if it changes less than two-fold while another parameter changes at least ten-fold. For example, in certain embodiments, an antisense activity is a change in the amount of a target nucleic acid. In certain such embodiments, the amount of a non-target nucleic acid is essentially unchanged if it changes much less than the target nucleic acid does, but the change need not be zero.

As used herein, “expression” means the process by which a gene ultimately results in a protein. Expression includes, but is not limited to, transcription, post-transcriptional modification (e.g., splicing, polyadenlyation, addition of 5′-cap), and translation.

As used herein, “target nucleic acid” means a nucleic acid molecule to which an antisense compound is intended to hybridize.

As used herein, “non-target nucleic acid” means a nucleic acid molecule to which hybridization of an antisense compound is not intended or desired. In certain embodiments, antisense compounds do hybridize to a non-target, due to homology between the target (intended) and non-target (un-intended).

As used herein, “mRNA” means an RNA molecule that encodes a protein.

As used herein, “pre-mRNA” means an RNA transcript that has not been fully processed into mRNA. Pre-RNA includes one or more intron.

As used herein, “object RNA” means an RNA molecule other than a target RNA, the amount, activity, splicing, and/or function of which is modulated, either directly or indirectly, by a target nucleic acid. In certain embodiments, a target nucleic acid modulates splicing of an object RNA. In certain such embodiments, an antisense compound modulates the amount or activity of the target nucleic acid, resulting in a change in the splicing of an object RNA and ultimately resulting in a change in the activity or function of the object RNA.

As used herein, “microRNA” means a naturally occurring, small, non-coding RNA that represses gene expression of at least one mRNA. In certain embodiments, a microRNA represses gene expression by binding to a target site within a 3′ untranslated region of an mRNA. In certain embodiments, a microRNA has a nucleobase sequence as set forth in miRBase, a database of published microRNA sequences found at http://microrna.sanger.ac.uk/sequences/. In certain embodiments, a microRNA has a nucleobase sequence as set forth in miRBase version 12.0 released September 2008, which is herein incorporated by reference in its entirety.

As used herein, “microRNA mimic” means an oligomeric compound having a sequence that is at least partially identical to that of a microRNA. In certain embodiments, a microRNA mimic comprises the microRNA seed region of a microRNA. In certain embodiments, a microRNA mimic modulates translation of more than one target nucleic acids. In certain embodiments, a microRNA mimic is double-stranded.

As used herein, “differentiating nucleobase” means a nucleobase that differs between two nucleic acids. In certain instances, a target region of a target nucleic acid differs by 1-4 nucleobases from a non-target nucleic acid. Each of those differences is referred to as a differentiating nucleobase. In certain instances, a differentiating nucleobase is a single-nucleotide polymorphism.

As used herein, “target-selective nucleoside” means a nucleoside of an antisense compound that corresponds to a differentiating nucleobase of a target nucleic acid.

As used herein, “allele” means one of a pair of copies of a gene existing at a particular locus or marker on a specific chromosome, or one member of a pair of nucleobases existing at a particular locus or marker on a specific chromosome, or one member of a pair of nucleobase sequences existing at a particular locus or marker on a specific chromosome. For a diploid organism or cell or for autosomal chromosomes, each allelic pair will normally occupy corresponding positions (loci) on a pair of homologous chromosomes, one inherited from the mother and one inherited from the father. If these alleles are identical, the organism or cell is said to be “homozygous” for that allele; if they differ, the organism or cell is said to be “heterozygous” for that allele. “Wild-type allele” refers to the genotype typically not associated with disease or dysfunction of the gene product. “Mutant allele” refers to the genotype associated with disease or dysfunction of the gene product.

As used herein, “allelic variant” means a particular identity of an allele, where more than one identity occurs. For example, an allelic variant may refer to either the mutant allele or the wild-type allele.

As used herein, “single nucleotide polymorphism” or “SNP” means a single nucleotide variation between the genomes of individuals of the same species. In some cases, a SNP may be a single nucleotide deletion or insertion. In general, SNPs occur relatively frequently in genomes and thus contribute to genetic diversity. The location of a SNP is generally flanked by highly conserved sequences. An individual may be homozygous or heterozygous for an allele at each SNP site.

As used herein, “single nucleotide polymorphism site” or “SNP site” refers to the nucleotides surrounding a SNP contained in a target nucleic acid to which an antisense compound is targeted.

As used herein, “targeting” or “targeted to” means the association of an antisense compound to a particular target nucleic acid molecule or a particular region of a target nucleic acid molecule. An antisense compound targets a target nucleic acid if it is sufficiently complementary to the target nucleic acid to allow hybridization under physiological conditions.

As used herein, “nucleobase complementarity” or “complementarity” when in reference to nucleobases means a nucleobase that is capable of base pairing with another nucleobase. For example, in DNA, adenine (A) is complementary to thymine (T). For example, in RNA, adenine (A) is complementary to uracil (U). In certain embodiments, complementary nucleobase means a nucleobase of an antisense compound that is capable of base pairing with a nucleobase of its target nucleic acid. For example, if a nucleobase at a certain position of an antisense compound is capable of hydrogen bonding with a nucleobase at a certain position of a target nucleic acid, then the position of hydrogen bonding between the oligonucleotide and the target nucleic acid is considered to be complementary at that nucleobase pair. Nucleobases comprising certain modifications may maintain the ability to pair with a counterpart nucleobase and thus, are still capable of nucleobase complementarity.

As used herein, “non-complementary” in reference to nucleobases means a pair of nucleobases that do not form hydrogen bonds with one another.

As used herein, “complementary” in reference to oligomeric compounds (e.g., linked nucleosides, oligonucleotides, or nucleic acids) means the capacity of such oligomeric compounds or regions thereof to hybridize to another oligomeric compound or region thereof through nucleobase complementarity under stringent conditions. Complementary oligomeric compounds need not have nucleobase complementarity at each nucleoside. Rather, some mismatches are tolerated. In certain embodiments, complementary oligomeric compounds or regions are complementary at 70% of the nucleobases (70% complementary). In certain embodiments, complementary oligomeric compounds or regions are 80% complementary. In certain embodiments, complementary oligomeric compounds or regions are 90% complementary. In certain embodiments, complementary oligomeric compounds or regions are 95% complementary. In certain embodiments, complementary oligomeric compounds or regions are 100% complementary.

As used herein, “mismatch” means a nucleobase of a first oligomeric compound that is not capable of pairing with a nucleobase at a corresponding position of a second oligomeric compound, when the first and second oligomeric compound are aligned. Either or both of the first and second oligomeric compounds may be oligonucleotides.

As used herein, “hybridization” means the pairing of complementary oligomeric compounds (e.g., an antisense compound and its target nucleic acid). While not limited to a particular mechanism, the most common mechanism of pairing involves hydrogen bonding, which may be Watson-Crick, Hoogsteen or reversed Hoogsteen hydrogen bonding, between complementary nucleobases.

As used herein, “specifically hybridizes” means the ability of an oligomeric compound to hybridize to one nucleic acid site with greater affinity than it hybridizes to another nucleic acid site. In certain embodiments, an antisense oligonucleotide specifically hybridizes to more than one target site.

As used herein, “fully complementary” in reference to an oligonucleotide or portion thereof means that each nucleobase of the oligonucleotide or portion thereof is capable of pairing with a nucleobase of a complementary nucleic acid or contiguous portion thereof. Thus, a fully complementary region comprises no mismatches or unhybridized nucleobases in either strand.

As used herein, “percent complementarity” means the percentage of nucleobases of an oligomeric compound that are complementary to an equal-length portion of a target nucleic acid. Percent complementarity is calculated by dividing the number of nucleobases of the oligomeric compound that are complementary to nucleobases at corresponding positions in the target nucleic acid by the total length of the oligomeric compound.

As used herein, “percent identity” means the number of nucleobases in a first nucleic acid that are the same type (independent of chemical modification) as nucleobases at corresponding positions in a second nucleic acid, divided by the total number of nucleobases in the first nucleic acid.

As used herein, “modulation” means a change of amount or quality of a molecule, function, or activity when compared to the amount or quality of a molecule, function, or activity prior to modulation. For example, modulation includes the change, either an increase (stimulation or induction) or a decrease (inhibition or reduction) in gene expression. As a further example, modulation of expression can include a change in splice site selection of pre-mRNA processing, resulting in a change in the absolute or relative amount of a particular splice-variant compared to the amount in the absence of modulation.

As used herein, “modification motif” means a pattern of chemical modifications in an oligomeric compound or a region thereof. Motifs may be defined by modifications at certain nucleosides and/or at certain linking groups of an oligomeric compound.

As used herein, “nucleoside motif” means a pattern of nucleoside modifications in an oligomeric compound or a region thereof. The linkages of such an oligomeric compound may be modified or unmodified. Unless otherwise indicated, motifs herein describing only nucleosides are intended to be nucleoside motifs. Thus, in such instances, the linkages are not limited.

As used herein, “sugar motif” means a pattern of sugar modifications in an oligomeric compound or a region thereof.

As used herein, “linkage motif” means a pattern of linkage modifications in an oligomeric compound or region thereof. The nucleosides of such an oligomeric compound may be modified or unmodified. Unless otherwise indicated, motifs herein describing only linkages are intended to be linkage motifs. Thus, in such instances, the nucleosides are not limited.

As used herein, “nucleobase modification motif” means a pattern of modifications to nucleobases along an oligonucleotide. Unless otherwise indicated, a nucleobase modification motif is independent of the nucleobase sequence.

As used herein, “sequence motif” means a pattern of nucleobases arranged along an oligonucleotide or portion thereof. Unless otherwise indicated, a sequence motif is independent of chemical modifications and thus may have any combination of chemical modifications, including no chemical modifications.

As used herein, “type of modification” in reference to a nucleoside or a nucleoside of a “type” means the chemical modification of a nucleoside and includes modified and unmodified nucleosides. Accordingly, unless otherwise indicated, a “nucleoside having a modification of a first type” may be an unmodified nucleoside.

As used herein, “differently modified” mean chemical modifications or chemical substituents that are different from one another, including absence of modifications. Thus, for example, a MOE nucleoside and an unmodified DNA nucleoside are “differently modified,” even though the DNA nucleoside is unmodified. Likewise, DNA and RNA are “differently modified,” even though both are naturally-occurring unmodified nucleosides. Nucleosides that are the same but for comprising different nucleobases are not differently modified. For example, a nucleoside comprising a 2′-OMe modified sugar and an unmodified adenine nucleobase and a nucleoside comprising a 2′-OMe modified sugar and an unmodified thymine nucleobase are not differently modified.

As used herein, “the same type of modifications” refers to modifications that are the same as one another, including absence of modifications. Thus, for example, two unmodified DNA nucleoside have “the same type of modification,” even though the DNA nucleoside is unmodified. Such nucleosides having the same type modification may comprise different nucleobases.

As used herein, “pharmaceutically acceptable carrier or diluent” means any substance suitable for use in administering to an animal. In certain embodiments, a pharmaceutically acceptable carrier or diluent is sterile saline. In certain embodiments, such sterile saline is pharmaceutical grade saline.

As used herein, “substituent” and “substituent group,” means an atom or group that replaces the atom or group of a named parent compound. For example a substituent of a modified nucleoside is any atom or group that differs from the atom or group found in a naturally occurring nucleoside (e.g., a modified 2′-substituent is any atom or group at the 2′-position of a nucleoside other than H or OH). Substituent groups can be protected or unprotected. In certain embodiments, compounds of the present invention have substituents at one or at more than one position of the parent compound. Substituents may also be further substituted with other substituent groups and may be attached directly or via a linking group such as an alkyl or hydrocarbyl group to a parent compound.

Likewise, as used herein, “substituent” in reference to a chemical functional group means an atom or group of atoms differs from the atom or a group of atoms normally present in the named functional group. In certain embodiments, a substituent replaces a hydrogen atom of the functional group (e.g., in certain embodiments, the substituent of a substituted methyl group is an atom or group other than hydrogen which replaces one of the hydrogen atoms of an unsubstituted methyl group). Unless otherwise indicated, groups amenable for use as substituents include without limitation, halogen, hydroxyl, alkyl, alkenyl, alkynyl, acyl (—C(O)R_(aa)), carboxyl (—C(O)O—R_(aa)), aliphatic groups, alicyclic groups, alkoxy, substituted oxy (—O—R_(aa)), aryl, aralkyl, heterocyclic radical, heteroaryl, heteroarylalkyl, amino (—N(R_(bb))(R_(cc))), imino(=NR_(bb)), amido (—C(O)N(R_(bb))(R_(cc)) or —N(R_(bb))C(O)R_(aa)), azido (—N₃), nitro (—NO₂), cyano (—CN), carbamido (—OC(O)N(R_(bb))(R_(cc)) or —N(R_(bb))C(O)OR_(aa)), ureido (—N(R_(bb))C(O)N(R_(bb))(R_(cc))), thioureido (—N(R_(bb))C(S)N(R_(bb))—(R_(cc))), guanidinyl (—N(R_(bb))C(═NR_(bb))N(R_(bb))(R_(cc))), amidinyl (—C(═NR_(bb))N(R_(bb))(R_(cc)) or —N(R_(bb))C(═NR_(bb))(R_(aa))), thiol (—SR_(bb)), sulfinyl (—S(O)R_(bb)), sulfonyl (—S(O)₂R_(bb)) and sulfonamidyl (—S(O)₂N(R_(bb))(R_(cc)) or —N(R_(bb))S—(O)₂R_(bb)). Wherein each R_(aa), R_(bb) and R_(cc) is, independently, H, an optionally linked chemical functional group or a further substituent group with a preferred list including without limitation, alkyl, alkenyl, alkynyl, aliphatic, alkoxy, acyl, aryl, aralkyl, heteroaryl, alicyclic, heterocyclic and heteroarylalkyl. Selected substituents within the compounds described herein are present to a recursive degree.

As used herein, “alkyl,” as used herein, means a saturated straight or branched hydrocarbon radical containing up to twenty four carbon atoms. Examples of alkyl groups include without limitation, methyl, ethyl, propyl, butyl, isopropyl, n-hexyl, octyl, decyl, dodecyl and the like. Alkyl groups typically include from 1 to about 24 carbon atoms, more typically from 1 to about 12 carbon atoms (C₁-C₁₂ alkyl) with from 1 to about 6 carbon atoms being more preferred.

As used herein, “alkenyl,” means a straight or branched hydrocarbon chain radical containing up to twenty four carbon atoms and having at least one carbon-carbon double bond. Examples of alkenyl groups include without limitation, ethenyl, propenyl, butenyl, 1-methyl-2-buten-1-yl, dienes such as 1,3-butadiene and the like. Alkenyl groups typically include from 2 to about 24 carbon atoms, more typically from 2 to about 12 carbon atoms with from 2 to about 6 carbon atoms being more preferred. Alkenyl groups as used herein may optionally include one or more further substituent groups.

As used herein, “alkynyl,” means a straight or branched hydrocarbon radical containing up to twenty four carbon atoms and having at least one carbon-carbon triple bond. Examples of alkynyl groups include, without limitation, ethynyl, 1-propynyl, 1-butynyl, and the like. Alkynyl groups typically include from 2 to about 24 carbon atoms, more typically from 2 to about 12 carbon atoms with from 2 to about 6 carbon atoms being more preferred. Alkynyl groups as used herein may optionally include one or more further substituent groups.

As used herein, “acyl,” means a radical formed by removal of a hydroxyl group from an organic acid and has the general Formula —C(O)—X where X is typically aliphatic, alicyclic or aromatic. Examples include aliphatic carbonyls, aromatic carbonyls, aliphatic sulfonyls, aromatic sulfinyls, aliphatic sulfinyls, aromatic phosphates, aliphatic phosphates and the like. Acyl groups as used herein may optionally include further substituent groups.

As used herein, “alicyclic” means a cyclic ring system wherein the ring is aliphatic. The ring system can comprise one or more rings wherein at least one ring is aliphatic. Preferred alicyclics include rings having from about 5 to about 9 carbon atoms in the ring. Alicyclic as used herein may optionally include further substituent groups.

As used herein, “aliphatic” means a straight or branched hydrocarbon radical containing up to twenty four carbon atoms wherein the saturation between any two carbon atoms is a single, double or triple bond. An aliphatic group preferably contains from 1 to about 24 carbon atoms, more typically from 1 to about 12 carbon atoms with from 1 to about 6 carbon atoms being more preferred. The straight or branched chain of an aliphatic group may be interrupted with one or more heteroatoms that include nitrogen, oxygen, sulfur and phosphorus. Such aliphatic groups interrupted by heteroatoms include without limitation, polyalkoxys, such as polyalkylene glycols, polyamines, and polyimines. Aliphatic groups as used herein may optionally include further substituent groups.

As used herein, “alkoxy” means a radical formed between an alkyl group and an oxygen atom wherein the oxygen atom is used to attach the alkoxy group to a parent molecule. Examples of alkoxy groups include without limitation, methoxy, ethoxy, propoxy, isopropoxy, n-butoxy, sec-butoxy, tert-butoxy, n-pentoxy, neopentoxy, n-hexoxy and the like. Alkoxy groups as used herein may optionally include further substituent groups.

As used herein, “aminoalkyl” means an amino substituted C₁-C₁₂ alkyl radical. The alkyl portion of the radical forms a covalent bond with a parent molecule. The amino group can be located at any position and the aminoalkyl group can be substituted with a further substituent group at the alkyl and/or amino portions.

As used herein, “aralkyl” and “arylalkyl” mean an aromatic group that is covalently linked to a C₁-C₁₂ alkyl radical. The alkyl radical portion of the resulting aralkyl (or arylalkyl) group forms a covalent bond with a parent molecule. Examples include without limitation, benzyl, phenethyl and the like. Aralkyl groups as used herein may optionally include further substituent groups attached to the alkyl, the aryl or both groups that form the radical group.

As used herein, “aryl” and “aromatic” mean a mono- or polycyclic carbocyclic ring system radicals having one or more aromatic rings. Examples of aryl groups include without limitation, phenyl, naphthyl, tetrahydronaphthyl, indanyl, idenyl and the like. Preferred aryl ring systems have from about 5 to about 20 carbon atoms in one or more rings. Aryl groups as used herein may optionally include further substituent groups.

As used herein, “halo” and “halogen,” mean an atom selected from fluorine, chlorine, bromine and iodine.

As used herein, “heteroaryl,” and “heteroaromatic,” mean a radical comprising a mono- or polycyclic aromatic ring, ring system or fused ring system wherein at least one of the rings is aromatic and includes one or more heteroatoms. Heteroaryl is also meant to include fused ring systems including systems where one or more of the fused rings contain no heteroatoms. Heteroaryl groups typically include one ring atom selected from sulfur, nitrogen or oxygen. Examples of heteroaryl groups include without limitation, pyridinyl, pyrazinyl, pyrimidinyl, pyrrolyl, pyrazolyl, imidazolyl, thiazolyl, oxazolyl, isooxazolyl, thiadiazolyl, oxadiazolyl, thiophenyl, furanyl, quinolinyl, isoquinolinyl, benzimidazolyl, benzooxazolyl, quinoxalinyl and the like. Heteroaryl radicals can be attached to a parent molecule directly or through a linking moiety such as an aliphatic group or hetero atom. Heteroaryl groups as used herein may optionally include further substituent groups.

As used herein, “huntingtin transcript” means a transcript transcribed from a huntingtin gene.

As used herein, “Intracerebroventricular” or “ICV” means administration into the ventricular system of the brain.

B. Oligomeric Compounds

In certain embodiments, the present invention provides oligomeric compounds. In certain embodiments, such oligomeric compounds comprise oligonucleotides optionally comprising one or more conjugate and/or terminal groups. In certain embodiments, an oligomeric compound consists of an oligonucleotide. In certain embodiments, oligonucleotides comprise one or more chemical modifications. Such chemical modifications include modifications of one or more nucleoside (including modifications to the sugar moiety and/or the nucleobase) and/or modifications to one or more internucleoside linkage.

a. Certain Modified Nucleosides

In certain embodiments, provided herein are oligomeric compounds comprising or consisting of oligonuleotides comprising at least one modified nucleoside. Such modified nucleosides comprise a modified sugar moeity, a modified nucleobase, or both a modified sugar moiety and a modified nucleobase.

i. Certain Modified Sugar Moieties

In certain embodiments, oligomeric compounds of the invention comprise one or more modified nucleosides comprising a modified sugar moiety. Such oligomeric compounds comprising one or more sugar-modified nucleosides may have desirable properties, such as enhanced nuclease stability or increased binding affinity with a target nucleic acid relative to oligomeric compounds comprising only nucleosides comprising naturally occurring sugar moieties. In certain embodiments, modified sugar moieties are substituted sugar moieties. In certain embodiments, modified sugar moieties are bicyclic or tricyclic sugar moieties. In certain embodiments, modified sugar moieties are sugar surrogates. Such sugar surogates may comprise one or more substitutions corresponding to those of substituted sugar moieties.

In certain embodiments, modified sugar moieties are substituted sugar moieties comprising one or more substituent, including but not limited to substituents at the 2′ and/or 5′ positions. Examples of sugar substituents suitable for the 2′-position, include, but are not limited to: 2′-F, 2′-OCH₃ (“OMe” or “O-methyl”), and 2′-O(CH₂)₂OCH₃ (“MOE”). In certain embodiments, sugar substituents at the 2′ position is selected from allyl, amino, azido, thio, O-allyl, O—C₁-C₁₀ alkyl, O—C₁-C₁₀ substituted alkyl; O—C₁-C₁₀ alkoxy; O—C₁-C₁₀ substituted alkoxy, OCF₃, O(CH₂)₂SCH₃, O(CH₂)₂—O—N(Rm)(Rn), and O—CH₂—C(═O)—N(Rm)(Rn), where each Rm and Rn is, independently, H or substituted or unsubstituted C₁-C₁₀ alkyl. Examples of sugar substituents at the 5′-position, include, but are not limited to: 5′-methyl (R or S); 5′-vinyl, and 5′-methoxy. In certain embodiments, substituted sugars comprise more than one non-bridging sugar substituent, for example, 2′-F-5′-methyl sugar moieties (see, e.g., PCT International Application WO 2008/101157, for additional 5′, 2′-bis substituted sugar moieties and nucleosides).

Nucleosides comprising 2′-substituted sugar moieties are referred to as 2′-substituted nucleosides. In certain embodiments, a 2′-substituted nucleoside comprises a 2′-substituent group selected from halo, allyl, amino, azido, O—C₁-C₁₀ alkoxy; O— C₁-C₁₀ substituted alkoxy, SH, CN, OCN, CF₃, OCF₃, O-alkyl, S-alkyl, N(R_(m))-alkyl; O— alkenyl, S— alkenyl, or N(R_(m))-alkenyl; O— alkynyl, S— alkynyl, N(R_(m))-alkynyl; O-alkylenyl-O-alkyl, alkynyl, alkaryl, aralkyl, O-alkaryl, O-aralkyl, O(CH₂)₂SCH₃, O—(CH₂)₂—O—N(R_(m))(R_(n)) or O—CH₂—C(═O)—N(R_(m))(R_(n)), where each R_(m) and R_(n) is, independently, H, an amino protecting group or substituted or unsubstituted C₁-C₁₀ alkyl. These 2′-substituent groups can be further substituted with one or more substituent groups independently selected from hydroxyl, amino, alkoxy, carboxy, benzyl, phenyl, nitro (NO₂), thiol, thioalkoxy (S-alkyl), halogen, alkyl, aryl, alkenyl and alkynyl.

In certain embodiments, a 2′-substituted nucleoside comprises a 2′-substituent group selected from F, NH₂, N₃, OCF₃, O—CH₃, O(CH₂)₃NH₂, CH₂—CH═CH₂, O—CH₂—CH═CH₂, OCH₂CH₂OCH₃, O(CH₂)₂SCH₃, O—(CH₂)₂—O—N(R_(m))(R_(n)), O(CH₂)₂O(CH₂)₂N(CH₃)₂, and N-substituted acetamide (O—CH₂—C(═O)—N(R_(m))(R_(n)) where each R_(m) and R_(n) is, independently, H, an amino protecting group or substituted or unsubstituted C₁-C₁₀ alkyl.

In certain embodiments, a 2′-substituted nucleoside comprises a sugar moiety comprising a 2′-substituent group selected from F, OCF₃, O—CH₃, OCH₂CH₂OCH₃, O(CH₂)₂SCH₃, O—(CH₂)₂—O—N(CH₃)₂, —O(CH₂)₂O(CH₂)₂N(CH₃)₂, and O—CH₂—C(═O)—N(H)CH₃.

In certain embodiments, a 2′-substituted nucleoside comprises a sugar moiety comprising a 2′-substituent group selected from F, O—CH₃, and OCH₂CH₂OCH₃.

Certain modified sugar moieties comprise a bridging sugar substituent that forms a second ring resulting in a bicyclic sugar moiety. In certain such embodiments, the bicyclic sugar moiety comprises a bridge between the 4′ and the 2′ furanose ring atoms. Examples of such 4′ to 2′ sugar substituents, include, but are not limited to: —[C(R_(a))(R_(b))]_(n)—, —[C(R_(a))(R_(b))]_(n)—O—, —C(R_(a)R_(b))—N(R)—O— or, —C(R_(a)R_(b))—O—N(R)—; 4′-CH₂-2′, 4′-(CH₂)₂-2′, 4′-(CH₂)₃-2′, 4′-(CH₂)—O-2′ (LNA); 4′-(CH₂)—S-2; 4′-(CH₂)₂—O-2′ (ENA); 4′-CH(CH₃)—O-2′ (cEt) and 4′-CH(CH₂OCH₃)—O-2′, and analogs thereof (see, e.g., U.S. Pat. No. 7,399,845, issued on Jul. 15, 2008); 4′-C(CH₃)(CH₃)—O-2′ and analogs thereof, (see, e.g., WO2009/006478, published Jan. 8, 2009); 4′-CH₂—N(OCH₃)-2′ and analogs thereof (see, e.g., WO2008/150729, published Dec. 11, 2008); 4′-CH₂—O—N(CH₃)-2′ (see, e.g., US2004/0171570, published Sep. 2, 2004); 4′-CH₂—O—N(R)-2′, and 4′-CH₂—N(R)—O-2′-, wherein each R is, independently, H, a protecting group, or C₁-C₁₂ alkyl; 4′-CH₂—N(R)—O-2′, wherein R is H, C₁-C₁₂ alkyl, or a protecting group (see, U.S. Pat. No. 7,427,672, issued on Sep. 23, 2008); 4′-CH₂—C(H)(CH₃)-2′ (see, e.g., Chattopadhyaya, et al., J. Org. Chem., 2009, 74, 118-134); and 4′-CH₂—C(═CH₂)-2′ and analogs thereof (see, published PCT International Application WO 2008/154401, published on Dec. 8, 2008).

In certain embodiments, such 4′ to 2′ bridges independently comprise from 1 to 4 linked groups independently selected from —[C(R_(a))(R_(b))]_(n)—, —C(R_(a))═C(R_(b))—, —C(R_(a))═N—, —C(═NR_(a))—, —C(═O)—, —C(═S)—, —O—, —Si(R_(a))₂—, —S(═O)_(x)—, and —N(R_(a))—;

wherein:

x is 0, 1, or 2;

n is 1, 2, 3, or 4;

each R_(a) and R_(b) is, independently, H, a protecting group, hydroxyl, C₁-C₁₂ alkyl, substituted C₁-C₁₂ alkyl, C₂-C₁₂ alkenyl, substituted C₂-C₁₂ alkenyl, C₂-C₁₂ alkynyl, substituted C₂-C₁₂ alkynyl, C₅-C₂₀ aryl, substituted C₅-C₂₀ aryl, heterocycle radical, substituted heterocycle radical, heteroaryl, substituted heteroaryl, C₅-C₇ alicyclic radical, substituted C₅-C₇ alicyclic radical, halogen, OJ₁, NJ₁J₂, SJ₁, N₃, COOJ₁, acyl (C(═O)—H), substituted acyl, CN, sulfonyl (S(═O)₂-J₁), or sulfoxyl (S(═O)-J₁); and

each J₁ and J₂ is, independently, H, C₁-C₁₂ alkyl, substituted C₁-C₁₂ alkyl, C₂-C₁₂ alkenyl, substituted C₂-C₁₂ alkenyl, C₂-C₁₂ alkynyl, substituted C₂-C₁₂ alkynyl, C₅-C₂₀ aryl, substituted C₅-C₂₀ aryl, acyl (C(═O)—H), substituted acyl, a heterocycle radical, a substituted heterocycle radical, C₁-C₁₂ aminoalkyl, substituted C₁-C₁₂ aminoalkyl, or a protecting group.

Nucleosides comprising bicyclic sugar moieties are referred to as bicyclic nucleosides or BNAs. Bicyclic nucleosides include, but are not limited to, (A) α-L-Methyleneoxy (4′-CH₂—O-2′) BNA, (B) β-D-Methyleneoxy (4′-CH₂—O-2′) BNA (also referred to as locked nucleic acid or LNA), (C) Ethyleneoxy (4′-(CH₂)₂—O-2′) BNA, (D) Aminooxy (4′-CH₂—O—N(R)-2′) BNA, (E) Oxyamino (4′-CH₂—N(R)—O-2′) BNA, (F) Methyl(methyleneoxy) (4′-CH(CH₃)—O-2′) BNA (also referred to as constrained ethyl or cEt), (G) methylene-thio (4′-CH₂—S-2′) BNA, (H) methylene-amino (4′-CH₂—N(R)-2′) BNA, (I) methyl carbocyclic (4′-CH₂—CH(CH₃)-2′) BNA, (J) propylene carbocyclic (4′-(CH₂)₃-2′) BNA, and (M) 4′-CH₂—O—CH₂-2′ as depicted below.

wherein Bx is a nucleobase moiety and R is, independently, H, a protecting group, or C₁-C₁₂ alkyl.

Additional bicyclic sugar moieties are known in the art, for example: Singh et al., Chem. Commun., 1998, 4, 455-456; Koshkin et al., Tetrahedron, 1998, 54, 3607-3630; Wahlestedt et al., Proc. Natl. Acad. Sci. U.S.A., 2000, 97, 5633-5638; Kumar et al., Bioorg. Med. Chem. Lett., 1998, 8, 2219-2222; Singh et al., J. Org. Chem., 1998, 63, 10035-10039; Srivastava et al., J. Am. Chem. Soc., 129(26) 8362-8379 (Jul. 4, 2007); Elayadi et al., Curr. Opinion Invens. Drugs, 2001, 2, 558-561; Braasch et al., Chem. Biol., 2001, 8, 1-7; Orum et al., Curr. Opinion Mol. Ther., 2001, 3, 239-243; U.S. Pat. Nos. 7,053,207, 6,268,490, 6,770,748, 6,794,499, 7,034,133, 6,525,191, 6,670,461, and 7,399,845; WO 2004/106356, WO 1994/14226, WO 2005/021570, and WO 2007/134181; U.S. Patent Publication Nos. US2004/0171570, US2007/0287831, and US2008/0039618; U.S. patent Ser. Nos. 12/129,154, 60/989,574, 61/026,995, 61/026,998, 61/056,564, 61/086,231, 61/097,787, and 61/099,844; and PCT International Applications Nos. PCT/US2008/064591, PCT/US2008/066154, and PCT/US2008/068922.

In certain embodiments, bicyclic sugar moieties and nucleosides incorporating such bicyclic sugar moieties are further defined by isomeric configuration. For example, a nucleoside comprising a 4′-2′ methylene-oxy bridge, may be in the α-L configuration or in the β-D configuration. Previously, α-L-methyleneoxy (4′-CH₂—O-2′) bicyclic nucleosides have been incorporated into antisense oligonucleotides that showed antisense activity (Frieden et al., Nucleic Acids Research, 2003, 21, 6365-6372).

In certain embodiments, substituted sugar moieties comprise one or more non-bridging sugar substituent and one or more bridging sugar substituent (e.g., 5′-substituted and 4′-2′ bridged sugars). (see, PCT International Application WO 2007/134181, published on Nov. 22, 2007, wherein LNA is substituted with, for example, a 5′-methyl or a 5′-vinyl group).

In certain embodiments, modified sugar moieties are sugar surrogates. In certain such embodiments, the oxygen atom of the naturally occurring sugar is substituted, e.g., with a sulfer, carbon or nitrogen atom. In certain such embodiments, such modified sugar moiety also comprises bridging and/or non-bridging substituents as described above. For example, certain sugar surogates comprise a 4′-sulfer atom and a substitution at the 2′-position (see, e.g., published U.S. Patent Application US2005/0130923, published on Jun. 16, 2005) and/or the 5′ position. By way of additional example, carbocyclic bicyclic nucleosides having a 4′-2′ bridge have been described (see, e.g., Freier et al., Nucleic Acids Research, 1997, 25(22), 4429-4443 and Albaek et al., J. Org. Chem., 2006, 71, 7731-7740).

In certain embodiments, sugar surrogates comprise rings having other than 5-atoms. For example, in certain embodiments, a sugar surrogate comprises a six-membered tetrahydropyran. Such tetrahydropyrans may be further modified or substituted. Nucleosides comprising such modified tetrahydropyrans include, but are not limited to, hexitol nucleic acid (HNA), anitol nucleic acid (ANA), manitol nucleic acid (MNA) (see Leumann, CJ. Bioorg. & Med. Chem. (2002) 10:841-854), fluoro HNA (F-HNA), and those compounds having Formula VII:

wherein independently for each of said at least one tetrahydropyran nucleoside analog of Formula VII:

Bx is a nucleobase moiety;

T₃ and T₄ are each, independently, an internucleoside linking group linking the tetrahydropyran nucleoside analog to the antisense compound or one of T₃ and T₄ is an internucleoside linking group linking the tetrahydropyran nucleoside analog to the antisense compound and the other of T₃ and T₄ is H, a hydroxyl protecting group, a linked conjugate group, or a 5′ or 3′-terminal group;

q₁, q₂, q₃, q₄, q₅, q₆ and q₇ are each, independently, H, C₁-C₆ alkyl, substituted C₁-C₆ alkyl, C₂-C₆ alkenyl, substituted C₂-C₆ alkenyl, C₂-C₆ alkynyl, or substituted C₂-C₆ alkynyl; and

each of R₁ and R₂ is independently selected from among: hydrogen, halogen, substituted or unsubstituted alkoxy, NJ₁J₂, SJ₁, N₃, OC(═X)J₁, OC(═X)NJ₁J₂, NJ₃C(═X)NJ₁J₂, and CN, wherein X is O, S or NJ₁, and each J₁, J₂, and J₃ is, independently, H or C₁-C₆ alkyl.

In certain embodiments, the modified THP nucleosides of Formula VII are provided wherein q₁, q₂, q₃, q₄, q₅, q₆ and q₇ are each H. In certain embodiments, at least one of q₁, q₂, q₃, q₄, q₅, q₆ and q₇ is other than H. In certain embodiments, at least one of q₁, q₂, q₃, q₄, q₅, q₆ and q₇ is methyl. In certain embodiments, THP nucleosides of Formula VII are provided wherein one of R₁ and R₂ is F. In certain embodiments, R₁ is fluoro and R₂ is H, R₁ is methoxy and R₂ is H, and R₁ is methoxyethoxy and R₂ is H.

Many other bicyclic and tricyclic sugar and sugar surrogate ring systems are known in the art that can be used to modify nucleosides (see, e.g., review article: Leumann, J. C, Bioorganic & Medicinal Chemistry, 2002, 10, 841-854).

In certain embodiments, sugar surrogates comprise rings having more than 5 atoms and more than one heteroatom. For example nucleosides comprising morpholino sugar moieties and their use in oligomeric compounds has been reported (see for example: Braasch et al., Biochemistry, 2002, 41, 4503-4510; and U.S. Pat. Nos. 5,698,685; 5,166,315; 5,185,444; and 5,034,506). As used here, the term “morpholino” means a sugar surrogate having the following structure:

In certain embodiments, morpholinos may be modified, for example by adding or altering various substituent groups from the above morpholino structure. Such sugar surrogates are referred to herein as “modified morpholinos.” Combinations of modifications are also provided without limitation, such as 2′-F-5′-methyl substituted nucleosides (see PCT International Application WO 2008/101157 Published on Aug. 21, 2008 for other disclosed 5′, 2′-bis substituted nucleosides) and replacement of the ribosyl ring oxygen atom with S and further substitution at the 2′-position (see published U.S. Patent Application US2005-0130923, published on Jun. 16, 2005) or alternatively 5′-substitution of a bicyclic nucleic acid (see PCT International Application WO 2007/134181, published on Nov. 22, 2007 wherein a 4′-CH₂—O-2′ bicyclic nucleoside is further substituted at the 5′ position with a 5′-methyl or a 5′-vinyl group). The synthesis and preparation of carbocyclic bicyclic nucleosides along with their oligomerization and biochemical studies have also been described (see, e.g., Srivastava et al., J. Am. Chem. Soc. 2007, 129(26), 8362-8379).

In certain embodiments, the present invention provides oligonucleotides comprising modified nucleosides. Those modified nucleotides may include modified sugars, modified nucleobases, and/or modified linkages. The specific modifications are selected such that the resulting oligonucleotides possess desirable characteristics. In certain embodiments, oligonucleotides comprise one or more RNA-like nucleosides. In certain embodiments, oligonucleotides comprise one or more DNA-like nucleotides.

ii. Certain Modified Nucleobases

In certain embodiments, nucleosides of the present invention comprise one or more unmodified nucleobases. In certain embodiments, nucleosides of the present invention comprise one or more modified nucleobases.

In certain embodiments, modified nucleobases are selected from: universal bases, hydrophobic bases, promiscuous bases, size-expanded bases, and fluorinated bases as defined herein. 5-substituted pyrimidines, 6-azapyrimidines and N-2, N-6 and 0-6 substituted purines, including 2-aminopropyladenine, 5-propynyluracil; 5-propynylcytosine; 5-hydroxymethyl cytosine, xanthine, hypoxanthine, 2-aminoadenine, 6-methyl and other alkyl derivatives of adenine and guanine, 2-propyl and other alkyl derivatives of adenine and guanine, 2-thiouracil, 2-thiothymine and 2-thiocytosine, 5-halouracil and cytosine, 5-propynyl (—C≡C—CH₃) uracil and cytosine and other alkynyl derivatives of pyrimidine bases, 6-azo uracil, cytosine and thymine, 5-uracil (pseudouracil), 4-thiouracil, 8-halo, 8-amino, 8-thiol, 8-thioalkyl, 8-hydroxyl and other 8-substituted adenines and guanines, 5-halo particularly 5-bromo, 5-trifluoromethyl and other 5-substituted uracils and cytosines, 7-methylguanine and 7-methyladenine, 2-F-adenine, 2-amino-adenine, 8-azaguanine and 8-azaadenine, 7-deazaguanine and 7-deazaadenine, 3-deazaguanine and 3-deazaadenine, universal bases, hydrophobic bases, promiscuous bases, size-expanded bases, and fluorinated bases as defined herein. Further modified nucleobases include tricyclic pyrimidines such as phenoxazine cytidine([5,4-b][1,4]benzoxazin-2(3H)-one), phenothiazine cytidine (1H-pyrimido[5,4-b][1,4]benzothiazin-2(3H)-one), G-clamps such as a substituted phenoxazine cytidine (e.g. 9-(2-aminoethoxy)-H-pyrimido[5,4-b][1,4]benzoxazin-2(3H)-one), carbazole cytidine (2H-pyrimido[4,5-b]indol-2-one), pyridoindole cytidine (H-pyrido[3′,2′:4,5]pyrrolo[2,3-d]pyrimidin-2-one). Modified nucleobases may also include those in which the purine or pyrimidine base is replaced with other heterocycles, for example 7-deaza-adenine, 7-deazaguanosine, 2-aminopyridine and 2-pyridone. Further nucleobases include those disclosed in U.S. Pat. No. 3,687,808, those disclosed in The Concise Encyclopedia Of Polymer Science And Engineering, Kroschwitz, J. I., Ed., John Wiley & Sons, 1990, 858-859; those disclosed by Englisch et al., Angewandte Chemie, International Edition, 1991, 30, 613; and those disclosed by Sanghvi, Y. S., Chapter 15, Antisense Research and Applications, Crooke, S. T. and Lebleu, B., Eds., CRC Press, 1993, 273-288.

Representative United States patents that teach the preparation of certain of the above noted modified nucleobases as well as other modified nucleobases include without limitation, U.S. Pat. Nos. 3,687,808; 4,845,205; 5,130,302; 5,134,066; 5,175,273; 5,367,066; 5,432,272; 5,457,187; 5,459,255; 5,484,908; 5,502,177; 5,525,711; 5,552,540; 5,587,469; 5,594,121; 5,596,091; 5,614,617; 5,645,985; 5,681,941; 5,750,692; 5,763,588; 5,830,653 and 6,005,096, certain of which are commonly owned with the instant application, and each of which is herein incorporated by reference in its entirety.

a. Certain Internucleoside Linkages

In certain embodiments, nucleosides may be linked together using any internucleoside linkage to form oligonucleotides. The two main classes of internucleoside linking groups are defined by the presence or absence of a phosphorus atom. Representative phosphorus containing internucleoside linkages include, but are not limited to, phosphodiesters (P═O), phosphotriesters, methylphosphonates, phosphoramidate, and phosphorothioates (P═S). Representative non-phosphorus containing internucleoside linking groups include, but are not limited to, methylenemethylimino (—CH₂—N(CH₃)—O—CH₂—), thiodiester (—O—C(O)—S—), thionocarbamate (—O—C(O)(NH)—S—); siloxane (—O—Si(H)₂—O—); and N,N′-dimethylhydrazine (—CH₂—N(CH₃)—N(CH₃)—). Modified linkages, compared to natural phosphodiester linkages, can be used to alter, typically increase, nuclease resistance of the oligonucleotide. In certain embodiments, internucleoside linkages having a chiral atom can be prepared as a racemic mixture, or as separate enantiomers. Representative chiral linkages include, but are not limited to, alkylphosphonates and phosphorothioates. Methods of preparation of phosphorous-containing and non-phosphorous-containing internucleoside linkages are well known to those skilled in the art.

The oligonucleotides described herein contain one or more asymmetric centers and thus give rise to enantiomers, diastereomers, and other stereoisomeric configurations that may be defined, in terms of absolute stereochemistry, as (R) or (S), α or β such as for sugar anomers, or as (D) or (L) such as for amino acids etc. Included in the antisense compounds provided herein are all such possible isomers, as well as their racemic and optically pure forms.

Neutral internucleoside linkages include without limitation, phosphotriesters, methylphosphonates, MMI (3′-CH₂—N(CH₃)—O-5′), amide-3 (3′-CH₂—C(═O)—N(H)-5′), amide-4 (3′-CH₂—N(H)—C(═O)-5′), formacetal (3′-O—CH₂—O-5′), and thioformacetal (3′-S—CH₂—O-5′). Further neutral internucleoside linkages include nonionic linkages comprising siloxane (dialkylsiloxane), carboxylate ester, carboxamide, sulfide, sulfonate ester and amides (See for example: Carbohydrate Modifications in Antisense Research; Y. S. Sanghvi and P. D. Cook, Eds., ACS Symposium Series 580; Chapters 3 and 4, 40-65). Further neutral internucleoside linkages include nonionic linkages comprising mixed N, O, S and CH₂ component parts.

iii. 3′-Endo Modifications

In one aspect of the present disclosure, oligomeric compounds include nucleosides synthetically modified to induce a 3′-endo sugar conformation. A nucleoside can incorporate synthetic modifications of the heterocyclic base moiety, the sugar moiety or both to induce a desired 3′-endo sugar conformation. These modified nucleosides are used to mimic RNA like nucleosides so that particular properties of an oligomeric compound can be enhanced while maintaining the desirable 3′-endo conformational geometry. There is an apparent preference for an RNA type duplex (A form helix, predominantly 3′-endo) as a requirement of RNA interference which is supported in part by the fact that duplexes composed of 2′-deoxy-2′-F-nucleosides appear efficient in triggering RNAi response in the C. elegans system. Properties that are enhanced by using more stable 3′-endo nucleosides include but aren't limited to modulation of pharmacokinetic properties through modification of protein binding, protein off-rate, absorption and clearance; modulation of nuclease stability as well as chemical stability; modulation of the binding affinity and specificity of the oligomer (affinity and specificity for enzymes as well as for complementary sequences); and increasing efficacy of RNA cleavage. The present invention provides oligomeric compounds having one or more nucleosides modified in such a way as to favor a C3′-endo type conformation.

Nucleoside conformation is influenced by various factors including substitution at the 2′, 3′ or 4′-positions of the pentofuranosyl sugar. Electronegative substituents generally prefer the axial positions, while sterically demanding substituents generally prefer the equatorial positions (Principles of Nucleic Acid Structure, Wolfgang Sanger, 1984, Springer-Verlag.) Modification of the 2′ position to favor the 3′-endo conformation can be achieved while maintaining the 2′-OH as a recognition element, as exemplified in Example 35, below (Gallo et al., Tetrahedron (2001), 57, 5707-5713. Harry-O'kuru et al., J. Org. Chem., (1997), 62(6), 1754-1759 and Tang et al., J. Org. Chem. (1999), 64, 747-754.) Alternatively, preference for the 3′-endo conformation can be achieved by deletion of the 2′-OH as exemplified by 2′deoxy-2′F-nucleosides (Kawasaki et al., J. Med. Chem. (1993), 36, 831-841), which adopts the 3′-endo conformation positioning the electronegative fluorine atom in the axial position. Other modifications of the ribose ring, for example substitution at the 4′-position to give 4′-F modified nucleosides (Guillerm et al., Bioorganic and Medicinal Chemistry Letters (1995), 5, 1455-1460 and Owen et al., J. Org. Chem. (1976), 41, 3010-3017), or for example modification to yield methanocarba nucleoside analogs (Jacobson et al., J. Med. Chem. Lett. (2000), 43, 2196-2203 and Lee et al., Bioorganic and Medicinal Chemistry Letters (2001), 11, 1333-1337) also induce preference for the 3′-endo conformation. Some modifications actually lock the conformational geometry by formation of a bicyclic sugar moiety e.g. locked nucleic acid (LNA, Singh et al, Chem. Commun. (1998), 4, 455-456), and ethylene bridged nucleic acids (ENA, Morita et al, Bioorganic & Medicinal Chemistry Letters (2002), 12, 73-76.)

b. Certain Motifs

In certain embodiments, oligomeric compounds comprise or consist of oligonucleotides. In certain embodiments, such oligonucleotides comprise one or more chemical modification. In certain embodiments, chemically modified oligonucleotides comprise one or more modified sugars. In certain embodiments, chemically modified oligonucleotides comprise one or more modified nucleobases. In certain embodiments, chemically modified oligonucleotides comprise one or more modified internucleoside linkages. In certain embodiments, the chemical modifications (sugar modifications, nucleobase modifications, and/or linkage modifications) define a pattern or motif. In certain embodiments, the patterns of chemical modifications of sugar moieties, internucleoside linkages, and nucleobases are each independent of one another. Thus, an oligonucleotide may be described by its sugar modification motif, internucleoside linkage motif and/or nucleobase modification motif (as used herein, nucleobase modification motif describes the chemical modifications to the nucleobases independent of the sequence of nucleobases).

iv. Certain Sugar Motifs

In certain embodiments, oligonucleotides comprise one or more type of modified sugar moieties and/or naturally occurring sugar moieties arranged along an oligonucleotide or region thereof in a defined pattern or sugar motif. Such sugar motifs include but are not limited to any of the sugar modifications discussed herein.

In certain embodiments, the oligonucleotides comprise or consist of a region having a gapmer sugar motif, which comprises two external regions or “wings” and a central or internal region or “gap.” The three regions of a gapmer sugar motif (the 5′-wing, the gap, and the 3′-wing) form a contiguous sequence of nucleosides wherein at least some of the sugar moieties of the nucleosides of each of the wings differ from at least some of the sugar moieties of the nucleosides of the gap. Specifically, at least the sugar moieties of the nucleosides of each wing that are closest to the gap (the 3′-most nucleoside of the 5′-wing and the 5′-most nucleoside of the 3′-wing) differ from the sugar moiety of the neighboring gap nucleosides, thus defining the boundary between the wings and the gap. In certain embodiments, the sugar moieties within the gap are the same as one another. In certain embodiments, the gap includes one or more nucleoside having a sugar moiety that differs from the sugar moiety of one or more other nucleosides of the gap. In certain embodiments, the sugar motifs of the two wings are the same as one another (symmetric sugar gapmer). In certain embodiments, the sugar motifs of the 5′-wing differs from the sugar motif of the 3′-wing (asymmetric sugar gapmer).

v. Certain Nucleobase Modification Motifs

In certain embodiments, oligonucleotides comprise chemical modifications to nucleobases arranged along the oligonucleotide or region thereof in a defined pattern or nucleobases modification motif. In certain embodiments, each nucleobase is modified. In certain embodiments, none of the nucleobases is chemically modified.

In certain embodiments, oligonucleotides comprise a block of modified nucleobases. In certain such embodiments, the block is at the 3′-end of the oligonucleotide. In certain embodiments the block is within 3 nucleotides of the 3′-end of the oligonucleotide. In certain such embodiments, the block is at the 5′-end of the oligonucleotide. In certain embodiments the block is within 3 nucleotides of the 5′-end of the oligonucleotide.

In certain embodiments, nucleobase modifications are a function of the natural base at a particular position of an oligonucleotide. For example, in certain embodiments each purine or each pyrimidine in an oligonucleotide is modified. In certain embodiments, each adenine is modified. In certain embodiments, each guanine is modified. In certain embodiments, each thymine is modified. In certain embodiments, each cytosine is modified. In certain embodiments, each uracil is modified.

In certain embodiments, oligonucleotides comprise one or more nucleosides comprising a modified nucleobase. In certain embodiments, oligonucleotides having a gapmer sugar motif comprise a nucleoside comprising a modified nucleobase. In certain such embodiments, one nucleoside comprising a modified nucleobases is in the central gap of an oligonucleotide having a gapmer sugar motif. In certain embodiments, the sugar is an unmodified 2′deoxynucleoside. In certain embodiments, the modified nucleobase is selected from: a 2-thio pyrimidine and a 5-propyne pyrimidine

In certain embodiments, some, all, or none of the cytosine moieties in an oligonucleotide are 5-methyl cytosine moieties. Herein, 5-methyl cytosine is not a “modified nucleobase.” Accordingly, unless otherwise indicated, unmodified nucleobases include both cytosine residues having a 5-methyl and those lacking a 5 methyl. In certain embodiments, the methylation state of all or some cytosine nucleobases is specified.

vi. Certain Nucleoside Motifs

In certain embodiments, oligonucleotides comprise nucleosides comprising modified sugar moieties and/or nucleosides comprising modified nucleobases. Such motifs can be described by their sugar motif and their nucleobase motif separately or by their nucleoside motif, which provides positions or patterns of modified nucleosides (whether modified sugar, nucleobase, or both sugar and nucleobase) in an oligonucleotide.

In certain embodiments, the oligonucleotides comprise or consist of a region having a gapmer nucleoside motif, which comprises two external regions or “wings” and a central or internal region or “gap.” The three regions of a gapmer nucleoside motif (the 5′-wing, the gap, and the 3′-wing) form a contiguous sequence of nucleosides wherein at least some of the sugar moieties and/or nucleobases of the nucleosides of each of the wings differ from at least some of the sugar moieties and/or nucleobase of the nucleosides of the gap. Specifically, at least the nucleosides of each wing that are closest to the gap (the 3′-most nucleoside of the 5′-wing and the 5′-most nucleoside of the 3′-wing) differ from the neighboring gap nucleosides, thus defining the boundary between the wings and the gap. In certain embodiments, the nucleosides within the gap are the same as one another. In certain embodiments, the gap includes one or more nucleoside that differs from one or more other nucleosides of the gap. In certain embodiments, the nucleoside motifs of the two wings are the same as one another (symmetric gapmer). In certain embodiments, the nucleoside motifs of the 5′-wing differs from the nucleoside motif of the 3′-wing (asymmetric gapmer).

vii. Certain 5′-Wings

In certain embodiments, the 5′-wing of a gapmer consists of 1 to 6 linked nucleosides. In certain embodiments, the 5′-wing of a gapmer consists of 1 to 5 linked nucleosides. In certain embodiments, the 5′-wing of a gapmer consists of 2 to 5 linked nucleosides. In certain embodiments, the 5′-wing of a gapmer consists of 3 to 5 linked nucleosides. In certain embodiments, the 5′-wing of a gapmer consists of 4 or 5 linked nucleosides. In certain embodiments, the 5′-wing of a gapmer consists of 1 to 4 linked nucleosides. In certain embodiments, the 5′-wing of a gapmer consists of 1 to 3 linked nucleosides. In certain embodiments, the 5′-wing of a gapmer consists of 1 or 2 linked nucleosides. In certain embodiments, the 5′-wing of a gapmer consists of 2 to 4 linked nucleosides. In certain embodiments, the 5′-wing of a gapmer consists of 2 or 3 linked nucleosides. In certain embodiments, the 5′-wing of a gapmer consists of 3 or 4 linked nucleosides. In certain embodiments, the 5′-wing of a gapmer consists of 1 nucleoside. In certain embodiments, the 5′-wing of a gapmer consists of 2 linked nucleosides. In certain embodiments, the 5′-wing of a gapmer consists of 3 linked nucleosides. In certain embodiments, the 5′-wing of a gapmer consists of 4 linked nucleosides. In certain embodiments, the 5′-wing of a gapmer consists of 5 linked nucleosides. In certain embodiments, the 5′-wing of a gapmer consists of 6 linked nucleosides.

In certain embodiments, the 5′-wing of a gapmer comprises at least one bicyclic nucleoside. In certain embodiments, the 5′-wing of a gapmer comprises at least two bicyclic nucleosides. In certain embodiments, the 5′-wing of a gapmer comprises at least three bicyclic nucleosides. In certain embodiments, the 5′-wing of a gapmer comprises at least four bicyclic nucleosides. In certain embodiments, the 5′-wing of a gapmer comprises at least one constrained ethyl nucleoside. In certain embodiments, the 5′-wing of a gapmer comprises at least one LNA nucleoside. In certain embodiments, each nucleoside of the 5′-wing of a gapmer is a bicyclic nucleoside. In certain embodiments, each nucleoside of the 5′-wing of a gapmer is a constrained ethyl nucleoside. In certain embodiments, each nucleoside of the 5′-wing of a gapmer is a LNA nucleoside.

In certain embodiments, the 5′-wing of a gapmer comprises at least one non-bicyclic modified nucleoside. In certain embodiments, the 5′-wing of a gapmer comprises at least one 2′-substituted nucleoside. In certain embodiments, the 5′-wing of a gapmer comprises at least one 2′-MOE nucleoside. In certain embodiments, the 5′-wing of a gapmer comprises at least one 2′-OMe nucleoside. In certain embodiments, each nucleoside of the 5′-wing of a gapmer is a non-bicyclic modified nucleoside. In certain embodiments, each nucleoside of the 5′-wing of a gapmer is a 2′-substituted nucleoside. In certain embodiments, each nucleoside of the 5′-wing of a gapmer is a 2′-MOE nucleoside. In certain embodiments, each nucleoside of the 5′-wing of a gapmer is a 2′-OMe nucleoside.

In certain embodiments, the 5′-wing of a gapmer comprises at least one 2′-deoxynucleoside. In certain embodiments, each nucleoside of the 5′-wing of a gapmer is a 2′-deoxynucleoside. In a certain embodiments, the 5′-wing of a gapmer comprises at least one ribonucleoside. In certain embodiments, each nucleoside of the 5′-wing of a gapmer is a ribonucleoside. In certain embodiments, one, more than one, or each of the nucleosides of the 5′-wing is an RNA-like nucleoside.

In certain embodiments, the 5′-wing of a gapmer comprises at least one bicyclic nucleoside and at least one non-bicyclic modified nucleoside. In certain embodiments, the 5′-wing of a gapmer comprises at least one bicyclic nucleoside and at least one 2′-substituted nucleoside. In certain embodiments, the 5′-wing of a gapmer comprises at least one bicyclic nucleoside and at least one 2′-MOE nucleoside. In certain embodiments, the 5′-wing of a gapmer comprises at least one bicyclic nucleoside and at least one 2′-OMe nucleoside. In certain embodiments, the 5′-wing of a gapmer comprises at least one bicyclic nucleoside and at least one 2′-deoxynucleoside.

In certain embodiments, the 5′-wing of a gapmer comprises at least one constrained ethyl nucleoside and at least one non-bicyclic modified nucleoside. In certain embodiments, the 5′-wing of a gapmer comprises at least one constrained ethyl nucleoside and at least one 2′-substituted nucleoside. In certain embodiments, the 5′-wing of a gapmer comprises at least one constrained ethyl nucleoside and at least one 2′-MOE nucleoside. In certain embodiments, the 5′-wing of a gapmer comprises at least one constrained ethyl nucleoside and at least one 2′-OMe nucleoside. In certain embodiments, the 5′-wing of a gapmer comprises at least one constrained ethyl nucleoside and at least one 2′-deoxynucleoside.

In certain embodiments, the 5′-wing of a gapmer has a nucleoside motif selected from among the following: ADDA; ABDAA; ABBA; ABB; ABAA; AABAA; AAABAA; AAAABAA; AAAAABAA; AAABAA; AABAA; ABAB; ABADB; ABADDB; AAABB; AAAAA; ABBDC; ABDDC; ABBDCC; ABBDDC; ABBDCC; ABBC; AA; AAA; AAAA; AAAAB; AAAAAAA; AAAAAAAA; ABBB; AB; ABAB; AAAAB; AABBB; AAAAB; and AABBB, wherein each A is a modified nucleoside of a first type, each B is a modified nucleoside of a second type, each C is a modified nucleoside of a third type, and each D is an unmodified deoxynucleoside.

In certain embodiments, the 5′-wing of a gapmer has a nucleoside motif selected from among the following: AB, ABB, AAA, BBB, BBBAA, AAB, BAA, BBAA, AABB, AAAB, ABBW, ABBWW, ABBB, ABBBB, ABAB, ABABAB, ABABBB, ABABAA, AAABB, AAAABB, AABB, AAAAB, AABBB, ABBBB, BBBBB, AAABW, AAAAA, BBBBAA, and AAABW; wherein each A is a modified nucleoside of a first type, each B is a modified nucleoside of a second type, and each W is a modified nucleoside of either the first type, the second type or a third type.

In certain embodiments, the 5′-wing of a gapmer has a nucleoside motif selected from among the following: ABB; ABAA; AABAA; AAABAA; ABAB; ABADB; AAABB; AAAAA; AA; AAA; AAAA; AAAAB; ABBB; AB; and ABAB; wherein each A is a modified nucleoside of a first type, each B is a modified nucleoside of a second type, and each W is a modified nucleoside of either the first type, the second type or a third type.

In certain embodiments, an oligonucleotide comprises any 5′-wing motif provided herein. In certain such embodiments, the oligonucleotide is a 5′-hemimer (does not comprise a 3′-wing). In certain embodiments, such an oligonucleotide is a gapmer. In certain such embodiments, the 3′-wing of the gapmer may comprise any nucleoside motif.

In certain embodiments, the 5′-wing of a gapmer has a sugar motif selected from among those listed in the following non-limiting tables:

TABLE 1 Certain 5′-Wing Sugar Motifs Certain 5′-Wing Sugar Motifs AAAAA ABCBB BABCC BCBBA CBACC AAAAB ABCBC BACAA BCBBB CBBAA AAAAC ABCCA BACAB BCBBC CBBAB AAABA ABCCB BACAC BCBCA CBBAC AAABB ABCCC BACBA BCBCB CBBBA AAABC ACAAA BACBB BCBCC CBBBB AAACA ACAAB BACBC BCCAA CBBBC AAACB ACAAC BACCA BCCAB CBBCA AAACC ACABA BACCB BCCAC CBBCB AABAA ACABB BACCC BCCBA CBBCC AABAB ACABC BBAAA BCCBB CBCAA AABAC ACACA BBAAB BCCBC CBCAB AABBA ACACB BBAAC BCCCA CBCAC AABBB ACACC BBABA BCCCB CBCBA AABBC ACBAA BBABB BCCCC CBCBB AABCA ACBAB BBABC CAAAA CBCBC AABCB ACBAC BBACA CAAAB CBCCA AABCC ACBBA BBACB CAAAC CBCCB AACAA ACBBB BBACC CAABA CBCCC AACAB ACBBC BBBAA CAABB CCAAA AACAC ACBCA BBBAB CAABC CCAAB AACBA ACBCB BBBAC CAACA CCAAC AACBB ACBCC BBBBA CAACB CCABA AACBC ACCAA BBBBB CAACC CCABB AACCA ACCAB BBBBC CABAA CCABC AACCB ACCAC BBBCA CABAB CCACA AACCC ACCBA BBBCB CABAC CCACB ABAAA ACCBB BBBCC CABBA CCACC ABAAB ACCBC BBCAA CABBB CCBAA ABAAC ACCCA BBCAB CABBC CCBAB ABABA ACCCB BBCAC CABCA CCBAC ABABB ACCCC BBCBA CABCB CCBBA ABABC BAAAA BBCBB CABCC CCBBB ABACA BAAAB BBCBC CACAA CCBBC ABACB BAAAC BBCCA CACAB CCBCA ABACC BAABA BBCCB CACAC CCBCB ABBAA BAABB BBCCC CACBA CCBCC ABBAB BAABC BCAAA CACBB CCCAA ABBAC BAACA BCAAB CACBC CCCAB ABBBA BAACB BCAAC CACCA CCCAC ABBBB BAACC BCABA CACCB CCCBA ABBBC BABAA BCABB CACCC CCCBB ABBCA BABAB BCABC CBAAA CCCBC ABBCB BABAC BCACA CBAAB CCCCA ABBCC BABBA BCACB CBAAC CCCCB ABCAA BABBB BCACC CBABA CCCCC ABCAB BABBC BCBAA CBABB ABCAC BABCA BCBAB CBABC ABCBA BABCB BCBAC CBACA

TABLE 2 Certain 5′-Wing Sugar Motifs Certain 5′-Wing Sugar Motifs AAAAA BABC CBAB ABBB BAA AAAAB BACA CBAC BAAA BAB AAABA BACB CBBA BAAB BBA AAABB BACC CBBB BABA BBB AABAA BBAA CBBC BABB AA AABAB BBAB CBCA BBAA AB AABBA BBAC CBCB BBAB AC AABBB BBBA CBCC BBBA BA ABAAA BBBB CCAA BBBB BB ABAAB BBBC CCAB AAA BC ABABA BBCA CCAC AAB CA ABABB BBCB CCBA AAC CB ABBAA BBCC CCBB ABA CC ABBAB BCAA CCBC ABB AA ABBBA BCAB CCCA ABC AB ABBBB BCAC CCCB ACA BA BAAAA ABCB BCBA ACB BAAAB ABCC BCBB ACC BAABA ACAA BCBC BAA BAABB ACAB BCCA BAB BABAA ACAC BCCB BAC BABAB ACBA BCCC BBA BABBA ACBB CAAA BBB BABBB ACBC CAAB BBC BBAAA ACCA CAAC BCA BBAAB ACCB CABA BCB BBABA ACCC CABB BCC BBABB BAAA CABC CAA BBBAA BAAB CACA CAB BBBAB BAAC CACB CAC BBBBA BABA CACC CBA BBBBB BABB CBAA CBB AAAA AACC CCCC CBC AAAB ABAA AAAA CCA AAAC ABAB AAAB CCB AABA ABAC AABA CCC AABB ABBA AABB AAA AABC ABBB ABAA AAB AACA ABBC ABAB ABA AACB ABCA ABBA ABB

In certain embodiments, each A, each B, and each C located at the 3′-most 5′-wing nucleoside is a modified nucleoside. For example, in certain embodiments the 5′-wing motif is selected from among ABB, BBB, and CBB, wherein the underlined nucleoside represents the 3′-most 5′-wing nucleoside and wherein the underlined nucleoside is a modified nucleoside. In certain embodiments, the 3′-most 5′-wing nucleoside comprises a bicyclic sugar moiety selected from among cEt, cMOE, LNA, α-L-LNA, ENA and 2′-thio LNA. In certain embodiments, the 3′-most 5′-wing nucleoside comprises a bicyclic sugar moiety selected from among cEt and LNA. In certain embodiments, the 3′-most 5′-wing nucleoside comprises cEt. In certain embodiments, the 3′-most 5′-wing nucleoside comprises LNA.

In certain embodiments, each A comprises an unmodified 2′-deoxyfuranose sugar moiety. In certain embodiments, each A comprises a modified sugar moiety. In certain embodiments, each A comprises a 2′-substituted sugar moiety. In certain embodiments, each A comprises a 2′-substituted sugar moiety selected from among F, ara-F, OCH₃ and O(CH₂)₂—OCH₃. In certain embodiments, each A comprises a bicyclic sugar moiety. In certain embodiments, each A comprises a bicyclic sugar moiety selected from among cEt, cMOE, LNA, α-L-LNA, ENA and 2′-thio LNA. In certain embodiments, each A comprises a modified nucleobase. In certain embodiments, each A comprises a modified nucleobase selected from among 2-thio-thymidine nucleoside and 5-propyne uridine nucleoside. In certain embodiments, each A comprises an HNA. In certain embodiments, each A comprises a F-HNA. In certain embodiments, each A comprises a 5′-substituted sugar moiety selected from among 5′-Me DNA, and 5′-(R)-Me DNA.

In certain embodiments, each B comprises an unmodified 2′-deoxyfuranose sugar moiety. In certain embodiments, each B comprises a modified sugar moiety. In certain embodiments, each B comprises a 2′-substituted sugar moiety. In certain embodiments, each B comprises a 2′-substituted sugar moiety selected from among F, (ara)-F, OCH₃ and O(CH₂)₂—OCH₃. In certain embodiments, each B comprises a bicyclic sugar moiety. In certain embodiments, each B comprises a bicyclic sugar moiety selected from among cEt, cMOE, LNA, α-L-LNA, ENA and 2′-thio LNA. In certain embodiments, each B comprises a modified nucleobase. In certain embodiments, each B comprises a modified nucleobase selected from among 2-thio-thymidine nucleoside and 5-propyne urindine nucleoside. In certain embodiments, each B comprises an HNA. In certain embodiments, each B comprises a F-HNA. In certain embodiments, each B comprises a 5′-substituted sugar moiety selected from among 5′-Me DNA, and 5′-(R)-Me DNA.

In certain embodiments, each A comprises a 2′-substituted sugar moiety selected from among F, ara-F, OCH₃ and O(CH₂)₂—OCH₃ and each B comprises a bicyclic sugar moiety selected from among cEt, cMOE, LNA, α-L-LNA, ENA and 2′-thio LNA. In certain embodiments, each A comprises O(CH₂)₂—OCH₃ and each B comprises cEt.

In certain embodiments, each C comprises an unmodified 2′-deoxyfuranose sugar moiety. In certain embodiments, each C comprises a modified sugar moiety. In certain embodiments, each C comprises a 2′-substituted sugar moiety. In certain embodiments, each C comprises a 2′-substituted sugar moiety selected from among F, (ara)-F, OCH₃ and O(CH₂)₂—OCH₃. In certain embodiments, each C comprises a 5′-substituted sugar moiety. In certain embodiments, each C comprises a 5′-substituted sugar moiety selected from among 5′-Me DNA, and 5′-(R)-Me DNA. In certain embodiments, each C comprises a bicyclic sugar moiety. In certain embodiments, each C comprises a bicyclic sugar moiety selected from among cEt, cMOE, LNA, α-L-LNA, ENA and 2′-thio LNA. In certain embodiments, each C comprises a modified nucleobase. In certain embodiments, each C comprises a modified nucleobase selected from among 2-thio-thymidine and 5-propyne uridine. In certain embodiments, each C comprises a 2-thio-thymidine nucleoside. In certain embodiments, each C comprises an HNA. In certain embodiments, each C comprises an F-HNA.

viii. Certain 3′-Wings

In certain embodiments, the 3′-wing of a gapmer consists of 1 to 6 linked nucleosides. In certain embodiments, the 3′-wing of a gapmer consists of 1 to 5 linked nucleosides. In certain embodiments, the 3′-wing of a gapmer consists of 2 to 5 linked nucleosides. In certain embodiments, the 3′-wing of a gapmer consists of 3 to 5 linked nucleosides. In certain embodiments, the 3′-wing of a gapmer consists of 4 or 5 linked nucleosides. In certain embodiments, the 3′-wing of a gapmer consists of 1 to 4 linked nucleosides. In certain embodiments, the 3′-wing of a gapmer consists of 1 to 3 linked nucleosides. In certain embodiments, the 3′-wing of a gapmer consists of 1 or 2 linked nucleosides. In certain embodiments, the 3′-wing of a gapmer consists of 2 to 4 linked nucleosides. In certain embodiments, the 3′-wing of a gapmer consists of 2 or 3 linked nucleosides. In certain embodiments, the 3′-wing of a gapmer consists of 3 or 4 linked nucleosides. In certain embodiments, the 3′-wing of a gapmer consists of 1 nucleoside. In certain embodiments, the 3′-wing of a gapmer consists of 2 linked nucleosides. In certain embodiments, the 3′-wing of a gapmer consists of 3 linked nucleosides. In certain embodiments, the 3′-wing of a gapmer consists of 4 linked nucleosides. In certain embodiments, the 3′-wing of a gapmer consists of 5 linked nucleosides. In certain embodiments, the 3′-wing of a gapmer consists of 6 linked nucleosides.

In certain embodiments, the 3′-wing of a gapmer comprises at least one bicyclic nucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one constrained ethyl nucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one LNA nucleoside. In certain embodiments, each nucleoside of the 3′-wing of a gapmer is a bicyclic nucleoside. In certain embodiments, each nucleoside of the 3′-wing of a gapmer is a constrained ethyl nucleoside. In certain embodiments, each nucleoside of the 3′-wing of a gapmer is a LNA nucleoside.

In certain embodiments, the 3′-wing of a gapmer comprises at least one non-bicyclic modified nucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least two non-bicyclic modified nucleosides. In certain embodiments, the 3′-wing of a gapmer comprises at least three non-bicyclic modified nucleosides. In certain embodiments, the 3′-wing of a gapmer comprises at least four non-bicyclic modified nucleosides. In certain embodiments, the 3′-wing of a gapmer comprises at least one 2′-substituted nucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one 2′-MOE nucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one 2′-OMe nucleoside. In certain embodiments, each nucleoside of the 3′-wing of a gapmer is a non-bicyclic modified nucleoside. In certain embodiments, each nucleoside of the 3′-wing of a gapmer is a 2′-substituted nucleoside. In certain embodiments, each nucleoside of the 3′-wing of a gapmer is a 2′-MOE nucleoside. In certain embodiments, each nucleoside of the 3′-wing of a gapmer is a 2′-OMe nucleoside.

In certain embodiments, the 3′-wing of a gapmer comprises at least one 2′-deoxynucleoside. In certain embodiments, each nucleoside of the 3′-wing of a gapmer is a 2′-deoxynucleoside. In a certain embodiments, the 3′-wing of a gapmer comprises at least one ribonucleoside. In certain embodiments, each nucleoside of the 3′-wing of a gapmer is a ribonucleoside. In certain embodiments, one, more than one, or each of the nucleosides of the 5′-wing is an RNA-like nucleoside.

In certain embodiments, the 3′-wing of a gapmer comprises at least one bicyclic nucleoside and at least one non-bicyclic modified nucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one bicyclic nucleoside and at least one 2′-substituted nucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one bicyclic nucleoside and at least one 2′-MOE nucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one bicyclic nucleoside and at least one 2′-OMe nucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one bicyclic nucleoside and at least one 2′-deoxynucleoside.

In certain embodiments, the 3′-wing of a gapmer comprises at least one constrained ethyl nucleoside and at least one non-bicyclic modified nucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one constrained ethyl nucleoside and at least one 2′-substituted nucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one constrained ethyl nucleoside and at least one 2′-MOE nucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one constrained ethyl nucleoside and at least one 2′-OMe nucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one constrained ethyl nucleoside and at least one 2′-deoxynucleoside.

In certain embodiments, the 3′-wing of a gapmer comprises at least one LNA nucleoside and at least one non-bicyclic modified nucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one LNA nucleoside and at least one 2′-substituted nucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one LNA nucleoside and at least one 2′-MOE nucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one LNA nucleoside and at least one 2′-OMe nucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one LNA nucleoside and at least one 2′-deoxynucleoside.

In certain embodiments, the 3′-wing of a gapmer comprises at least one bicyclic nucleoside, at least one non-bicyclic modified nucleoside, and at least one 2′-deoxynucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one constrained ethyl nucleoside, at least one non-bicyclic modified nucleoside, and at least one 2′-deoxynucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one LNA nucleoside, at least one non-bicyclic modified nucleoside, and at least one 2′-deoxynucleoside.

In certain embodiments, the 3′-wing of a gapmer comprises at least one bicyclic nucleoside, at least one 2′-substituted nucleoside, and at least one 2′-deoxynucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one constrained ethyl nucleoside, at least one 2′-substituted nucleoside, and at least one 2′-deoxynucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one LNA nucleoside, at least one 2′-substituted nucleoside, and at least one 2′-deoxynucleoside.

In certain embodiments, the 3′-wing of a gapmer comprises at least one bicyclic nucleoside, at least one 2′-MOE nucleoside, and at least one 2′-deoxynucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one constrained ethyl nucleoside, at least one 2′-MOE nucleoside, and at least one 2′-deoxynucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one LNA nucleoside, at least one 2′-MOE nucleoside, and at least one 2′-deoxynucleoside.

In certain embodiments, the 3′-wing of a gapmer comprises at least one bicyclic nucleoside, at least one 2′-OMe nucleoside, and at least one 2′-deoxynucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one constrained ethyl nucleoside, at least one 2′-OMe nucleoside, and at least one 2′-deoxynucleoside. In certain embodiments, the 3′-wing of a gapmer comprises at least one LNA nucleoside, at least one 2′-OMe nucleoside, and at least one 2′-deoxynucleoside.

In certain embodiments, the 3′-wing of a gapmer has a nucleoside motif selected from among the following: ABB, ABAA, AAABAA, AAAAABAA, AABAA, AAAABAA, AAABAA, ABAB, AAAAA, AAABB, AAAAAAAA, AAAAAAA, AAAAAA, AAAAB, AAAA, AAA, AA, AB, ABBB, ABAB, AABBB; wherein each A is a modified nucleoside of a first type, each B is a modified nucleoside of a second type. In certain embodiments, an oligonucleotide comprises any 3′-wing motif provided herein. In certain such embodiments, the oligonucleotide is a 3′-hemimer (does not comprise a 5′-wing). In certain embodiments, such an oligonucleotide is a gapmer. In certain such embodiments, the 5′-wing of the gapmer may comprise any nucleoside motif.

In certain embodiments, the 3′-wing of a gapmer has a nucleoside motif selected from among the following: BBA, AAB, AAA, BBB, BBAA, AABB, WBBA, WAAB, BBBA, BBBBA, BBBB, BBBBBA, ABBBBB, BBAAA, AABBB, BBBAA, BBBBA, BBBBB, BABA, AAAAA, BBAAAA, AABBBB, BAAAA, and ABBBB, wherein each A is a modified nucleoside of a first type, each B is a modified nucleoside of a second type, and each W is a modified nucleoside of either the first type, the second type or a third type.

In certain embodiments, the 3′-wing of a gapmer has a nucleoside motif selected from among the following: ABB; AAABAA; AABAA; AAAABAA; AAAAA; AAABB; AAAAAAAA; AAAAAAA; AAAAAA; AAAAB; AB; ABBB; and ABAB, wherein each A is a modified nucleoside of a first type, each B is a modified nucleoside of a second type, and each W is a modified nucleoside of either the first type, the second type or a third type.

In certain embodiments, the 3′-wing of a gapmer has a sugar motif selected from among those listed in the following non-limiting tables:

TABLE 3 Certain 3′-Wing Sugar Motifs Certain 3′-Wing Sugar Motifs AAAAA ABCBB BABCC BCBBA CBACC AAAAB ABCBC BACAA BCBBB CBBAA AAAAC ABCCA BACAB BCBBC CBBAB AAABA ABCCB BACAC BCBCA CBBAC AAABB ABCCC BACBA BCBCB CBBBA AAABC ACAAA BACBB BCBCC CBBBB AAACA ACAAB BACBC BCCAA CBBBC AAACB ACAAC BACCA BCCAB CBBCA AAACC ACABA BACCB BCCAC CBBCB AABAA ACABB BACCC BCCBA CBBCC AABAB ACABC BBAAA BCCBB CBCAA AABAC ACACA BBAAB BCCBC CBCAB AABBA ACACB BBAAC BCCCA CBCAC AABBB ACACC BBABA BCCCB CBCBA AABBC ACBAA BBABB BCCCC CBCBB AABCA ACBAB BBABC CAAAA CBCBC AABCB ACBAC BBACA CAAAB CBCCA AABCC ACBBA BBACB CAAAC CBCCB AACAA ACBBB BBACC CAABA CBCCC AACAB ACBBC BBBAA CAABB CCAAA AACAC ACBCA BBBAB CAABC CCAAB AACBA ACBCB BBBAC CAACA CCAAC AACBB ACBCC BBBBA CAACB CCABA AACBC ACCAA BBBBB CAACC CCABB AACCA ACCAB BBBBC CABAA CCABC AACCB ACCAC BBBCA CABAB CCACA AACCC ACCBA BBBCB CABAC CCACB ABAAA ACCBB BBBCC CABBA CCACC ABAAB ACCBC BBCAA CABBB CCBAA ABAAC ACCCA BBCAB CABBC CCBAB ABABA ACCCB BBCAC CABCA CCBAC ABABB ACCCC BBCBA CABCB CCBBA ABABC BAAAA BBCBB CABCC CCBBB ABACA BAAAB BBCBC CACAA CCBBC ABACB BAAAC BBCCA CACAB CCBCA ABACC BAABA BBCCB CACAC CCBCB ABBAA BAABB BBCCC CACBA CCBCC ABBAB BAABC BCAAA CACBB CCCAA ABBAC BAACA BCAAB CACBC CCCAB ABBBA BAACB BCAAC CACCA CCCAC ABBBB BAACC BCABA CACCB CCCBA ABBBC BABAA BCABB CACCC CCCBB ABBCA BABAB BCABC CBAAA CCCBC ABBCB BABAC BCACA CBAAB CCCCA ABBCC BABBA BCACB CBAAC CCCCB ABCAA BABBB BCACC CBABA CCCCC ABCAB BABBC BCBAA CBABB ABCAC BABCA BCBAB CBABC ABCBA BABCB BCBAC CBACA

TABLE 4 Certain 3′-Wing Sugar Motifs Certain 3′-Wing Sugar Motifs AAAAA BABC CBAB ABBB BAA AAAAB BACA CBAC BAAA BAB AAABA BACB CBBA BAAB BBA AAABB BACC CBBB BABA BBB AABAA BBAA CBBC BABB AA AABAB BBAB CBCA BBAA AB AABBA BBAC CBCB BBAB AC AABBB BBBA CBCC BBBA BA ABAAA BBBB CCAA BBBB BB ABAAB BBBC CCAB AAA BC ABABA BBCA CCAC AAB CA ABABB BBCB CCBA AAC CB ABBAA BBCC CCBB ABA CC ABBAB BCAA CCBC ABB AA ABBBA BCAB CCCA ABC AB ABBBB BCAC CCCB ACA BA BAAAA ABCB BCBA ACB BAAAB ABCC BCBB ACC BAABA ACAA BCBC BAA BAABB ACAB BCCA BAB BABAA ACAC BCCB BAC BABAB ACBA BCCC BBA BABBA ACBB CAAA BBB BABBB ACBC CAAB BBC BBAAA ACCA CAAC BCA BBAAB ACCB CABA BCB BBABA ACCC CABB BCC BBABB BAAA CABC CAA BBBAA BAAB CACA CAB BBBAB BAAC CACB CAC BBBBA BABA CACC CBA BBBBB BABB CBAA CBB AAAA AACC CCCC CBC AAAB ABAA AAAA CCA AAAC ABAB AAAB CCB AABA ABAC AABA CCC AABB ABBA AABB AAA AABC ABBB ABAA AAB AACA ABBC ABAB ABA AACB ABCA ABBA ABB

In certain embodiments, each A, each B, and each C located at the 5′-most 3′-wing region nucleoside is a modified nucleoside. For example, in certain embodiments the 3′-wing motif is selected from among ABB, BBB, and CBB, wherein the underlined nucleoside represents the 5′-most 3′-wing region nucleoside and wherein the underlined nucleoside is a modified nucleoside.

In certain embodiments, each A comprises an unmodified 2′-deoxyfuranose sugar moiety. In certain embodiments, each A comprises a modified sugar moiety. In certain embodiments, each A comprises a 2′-substituted sugar moiety. In certain embodiments, each A comprises a 2′-substituted sugar moiety selected from among F, ara-F, OCH₃ and O(CH₂)₂—OCH₃. In certain embodiments, each A comprises a bicyclic sugar moiety. In certain embodiments, each A comprises a bicyclic sugar moiety selected from among cEt, cMOE, LNA, α-L-LNA, ENA and 2′-thio LNA. In certain embodiments, each A comprises a modified nucleobase. In certain embodiments, each A comprises a modified nucleobase selected from among 2-thio-thymidine nucleoside and 5-propyne uridine nucleoside. In certain embodiments, each A comprises a 5′-substituted sugar moiety selected from among 5′-Me DNA, and 5′-(R)-Me DNA.

In certain embodiments, each B comprises an unmodified 2′-deoxyfuranose sugar moiety. In certain embodiments, each B comprises a modified sugar moiety. In certain embodiments, each B comprises a 2′-substituted sugar moiety. In certain embodiments, each B comprises a 2′-substituted sugar moiety selected from among F, (ara)-F, OCH₃ and O(CH₂)₂—OCH₃. In certain embodiments, each B comprises a bicyclic sugar moiety. In certain embodiments, each B comprises a bicyclic sugar moiety selected from among cEt, cMOE, LNA, α-L-LNA, ENA and 2′-thio LNA. In certain embodiments, each B comprises a modified nucleobase. In certain embodiments, each B comprises a modified nucleobase selected from among 2-thio-thymidine nucleoside and 5-propyne urindine nucleoside. In certain embodiments, each B comprises an HNA. In certain embodiments, each B comprises an F-HNA. In certain embodiments, each B comprises a 5′-substituted sugar moiety selected from among 5′-Me DNA, and 5′-(R)-Me DNA.

In certain embodiments, each A comprises a 2′-substituted sugar moiety selected from among F, ara-F, OCH₃ and O(CH₂)₂—OCH₃ and each B comprises a bicyclic sugar moiety selected from among cEt, cMOE, LNA, α-L-LNA, ENA and 2′-thio LNA. In certain embodiments, each A comprises O(CH₂)₂—OCH₃ and each B comprises cEt.

In certain embodiments, each C comprises an unmodified 2′-deoxyfuranose sugar moiety. In certain embodiments, each C comprises a modified sugar moiety. In certain embodiments, each C comprises a 2′-substituted sugar moiety. In certain embodiments, each C comprises a 2′-substituted sugar moiety selected from among F, (ara)-F, OCH₃ and O(CH₂)₂—OCH₃. In certain embodiments, each C comprises a 5′-substituted sugar moiety. In certain embodiments, each C comprises a 5′-substituted sugar moiety selected from among 5′-Me, and 5′-(R)-Me. In certain embodiments, each C comprises a bicyclic sugar moiety. In certain embodiments, each C comprises a bicyclic sugar moiety selected from among cEt, cMOE, LNA, α-L-LNA, ENA and 2′-thio LNA. In certain embodiments, each C comprises a modified nucleobase. In certain embodiments, each C comprises a modified nucleobase selected from among 2-thio-thymidine and 5-propyne uridine. In certain embodiments, each C comprises a 2-thio-thymidine nucleoside. In certain embodiments, each C comprises an HNA. In certain embodiments, each C comprises an F-HNA.

ix. Certain Central Regions (Gaps)

In certain embodiments, the gap of a gapmer consists of 6 to 20 linked nucleosides. In certain embodiments, the gap of a gapmer consists of 6 to 15 linked nucleosides. In certain embodiments, the gap of a gapmer consists of 6 to 12 linked nucleosides. In certain embodiments, the gap of a gapmer consists of 6 to 10 linked nucleosides. In certain embodiments, the gap of a gapmer consists of 6 to 9 linked nucleosides. In certain embodiments, the gap of a gapmer consists of 6 to 8 linked nucleosides. In certain embodiments, the gap of a gapmer consists of 6 or 7 linked nucleosides. In certain embodiments, the gap of a gapmer consists of 7 to 10 linked nucleosides. In certain embodiments, the gap of a gapmer consists of 7 to 9 linked nucleosides. In certain embodiments, the gap of a gapmer consists of 7 or 8 linked nucleosides. In certain embodiments, the gap of a gapmer consists of 8 to 10 linked nucleosides. In certain embodiments, the gap of a gapmer consists of 8 or 9 linked nucleosides. In certain embodiments, the gap of a gapmer consists of 6 linked nucleosides. In certain embodiments, the gap of a gapmer consists of 7 linked nucleosides. In certain embodiments, the gap of a gapmer consists of 8 linked nucleosides. In certain embodiments, the gap of a gapmer consists of 9 linked nucleosides. In certain embodiments, the gap of a gapmer consists of 10 linked nucleosides. In certain embodiments, the gap of a gapmer consists of 11 linked nucleosides. In certain embodiments, the gap of a gapmer consists of 12 linked nucleosides.

In certain embodiments, each nucleoside of the gap of a gapmer is a 2′-deoxynucleoside. In certain embodiments, the gap comprises one or more modified nucleosides. In certain embodiments, each nucleoside of the gap of a gapmer is a 2′-deoxynucleoside or is a modified nucleoside that is “DNA-like.” In such embodiments, “DNA-like” means that the nucleoside has similar characteristics to DNA, such that a duplex comprising the gapmer and an RNA molecule is capable of activating RNase H. For example, under certain conditions, 2′-(ara)-F have been shown to support RNase H activation, and thus is DNA-like. In certain embodiments, one or more nucleosides of the gap of a gapmer is not a 2′-deoxynucleoside and is not DNA-like. In certain such embodiments, the gapmer nonetheless supports RNase H activation (e.g., by virtue of the number or placement of the non-DNA nucleosides).

In certain embodiments, gaps comprise a stretch of unmodified 2′-deoxynucleoside interrupted by one or more modified nucleosides, thus resulting in three sub-regions (two stretches of one or more 2′-deoxynucleosides and a stretch of one or more interrupting modified nucleosides). In certain embodiments, no stretch of unmodified 2′-deoxynucleosides is longer than 5, 6, or 7 nucleosides. In certain embodiments, such short stretches is achieved by using short gap regions. In certain embodiments, short stretches are achieved by interrupting a longer gap region.

In certain embodiments, the gap comprises one or more modified nucleosides. In certain embodiments, the gap comprises one or more modified nucleosides selected from among cEt, FHNA, LNA, and 2-thio-thymidine. In certain embodiments, the gap comprises one modified nucleoside. In certain embodiments, the gap comprises a 5′-substituted sugar moiety selected from among 5′-Me, and 5′-(R)-Me. In certain embodiments, the gap comprises two modified nucleosides. In certain embodiments, the gap comprises three modified nucleosides. In certain embodiments, the gap comprises four modified nucleosides. In certain embodiments, the gap comprises two or more modified nucleosides and each modified nucleoside is the same. In certain embodiments, the gap comprises two or more modified nucleosides and each modified nucleoside is different.

In certain embodiments, the gap comprises one or more modified linkages. In certain embodiments, the gap comprises one or more methyl phosphonate linkages. In certain embodiments the gap comprises two or more modified linkages. In certain embodiments, the gap comprises one or more modified linkages and one or more modified nucleosides. In certain embodiments, the gap comprises one modified linkage and one modified nucleoside. In certain embodiments, the gap comprises two modified linkages and two or more modified nucleosides.

In certain embodiments, the gap comprises a nucleoside motif selected from among the following: DDDDXDDDDD; DDDDDXDDDDD; DDDXDDDDD; DDDDXDDDDDD; DDDDXDDDD; DDXDDDDDD; DDDXDDDDDD; DXDDDDDD; DDXDDDDDDD; DDXDDDDD; DDXDDDXDDD; DDDXDDDXDDD; DXDDDXDDD; DDXDDDXDD; DDXDDDDXDDD; DDXDDDDXDD; DXDDDDXDDD; DDDDXDDD; DDDXDDD; DXDDDDDDD; DDDDXXDDD; and DXXDXXDXX; wherein each D is an unmodified deoxynucleoside; and each X is a modified nucleoside or a substituted sugar moiety.

In certain embodiments, the gap comprises a nucleoside motif selected from among the following: DDDDDDDDD; DXDDDDDDD; DDXDDDDDD; DDDXDDDDD; DDDDXDDDD; DDDDDXDDD; DDDDDDXDD; DDDDDDDXD; DXXDDDDDD; DDDDDDXXD; DDXXDDDDD; DDDXXDDDD; DDDDXXDDD; DDDDDXXDD; DXDDDDDXD; DXDDDDXDD; DXDDDXDDD; DXDDXDDDD; DXDXDDDDD; DDXDDDDXD; DDXDDDXDD; DDXDDXDDD; DDXDXDDDD; DDDXDDDXD; DDDXDDXDD; DDDXDXDDD; DDDDXDDXD; DDDDXDXDD; and DDDDDXDXD, wherein each D is an unmodified deoxynucleoside; and each X is a modified nucleoside or a substituted sugar moiety.

In certain embodiments, the gap comprises a nucleoside motif selected from among the following: DDDDXDDDD, DXDDDDDDD, DXXDDDDDD, DDXDDDDDD, DDDXDDDDD, DDDDXDDDD, DDDDDXDDD, DDDDDDXDD, and DDDDDDDXD, wherein each D is an unmodified deoxynucleoside; and each X is a modified nucleoside or a substituted sugar moiety.

In certain embodiments, the gap comprises a nucleoside motif selected from among the following: DDDDDDDD, DXDDDDDD, DDXDDDDD, DDDXDDDD, DDDDXDDD, DDDDDXDD, DDDDDDXD, DXDDDDXD, DXDDDXDD, DXDDXDDD, DXDXDDDD, DXXDDDDD, DDXXDDDD, DDXDXDDD, DDXDDXDD, DXDDDDXD, DDDXXDDD, DDDXDXDD, DDDXDDXD, DDDDXXDD, DDDDXDXD, and DDDDDXXD, wherein each D is an unmodified deoxynucleoside; and each X is a modified nucleoside or a substituted sugar moiety.

In certain embodiments, the gap comprises a nucleoside motif selected from among the following: DXDDDDD, DDXDDDD, DDDXDDD, DDDDXDD, DDDDDXD, DXDDDXD, DXDDXDD, DXDXDDD, DXXDDDD, DDXXDDD, DDXDXDD, DDXDDXD, DDDXXDD, DDDXDXD, and DDDDXXD, wherein each D is an unmodified deoxynucleoside; and each X is a modified nucleoside or a substituted sugar moiety.

In certain embodiments, the gap comprises a nucleoside motif selected from among the following: DXDDDD, DDXDDD, DDDXDD, DDDDXD, DXXDDD, DXDXDD, DXDDXD, DDXXDD, DDXDXD, and DDDXXD, wherein each D is an unmodified deoxynucleoside; and each X is a modified nucleoside or a substituted sugar moiety.

In certain embodiments, the gap comprises a nucleoside motif selected from among the following: DXDDDD, DDXDDD, DDDXDD, DDDDXD, DXDDDDD, DDXDDDD, DDDXDDD, DDDDXDD, DDDDDXD, DXDDDDDD, DDXDDDDD, DDDXDDDD, DDDDXDDD, DDDDDXDD, DDDDDDXD, DXDDDDDDD; DDXDDDDDD, DDDXDDDDD, DDDDXDDDD, DDDDDXDDD, DDDDDDXDD, DDDDDDDXD, DXDDDDDDDD, DDXDDDDDDD, DDDXDDDDDD, DDDDXDDDDD, DDDDDXDDDD, DDDDDDXDDD, DDDDDDDXDD, and DDDDDDDDXD, wherein each D is an unmodified deoxynucleoside; and each X is a modified nucleoside or a substituted sugar moiety.

In certain embodiments, each X comprises an unmodified 2′-deoxyfuranose sugar moiety. In certain embodiments, each X comprises a modified sugar moiety. In certain embodiments, each X comprises a 2′-substituted sugar moiety. In certain embodiments, each X comprises a 2′-substituted sugar moiety selected from among F, (ara)-F, OCH₃ and O(CH₂)₂—OCH₃. In certain embodiments, each X comprises a 5′-substituted sugar moiety. In certain embodiments, each X comprises a 5′-substituted sugar moiety selected from among 5′-Me, and 5′-(R)-Me. In certain embodiments, each X comprises a bicyclic sugar moiety. In certain embodiments, each X comprises a bicyclic sugar moiety selected from among cEt, cMOE, LNA, α-L-LNA, ENA and 2′-thio LNA. In certain embodiments, each X comprises a modified nucleobase. In certain embodiments, each X comprises a modified nucleobase selected from among 2-thio-thymidine and 5-propyne uridine. In certain embodiments, each X comprises a 2-thio-thymidine nucleoside. In certain embodiments, each X comprises an HNA. In certain embodiments, each C comprises an F-HNA. In certain embodiments, X represents the location of a single differentiating nucleobase.

x. Certain Gapmer Motifs

In certain embodiments, a gapmer comprises a 5′-wing, a gap, and a 3′ wing, wherein the 5′-wing, gap, and 3′ wing are independently selected from among those discussed above. For example, in certain embodiments, a gapmer has a 5′-wing, a gap, and a 3′-wing having features selected from among any of those listed in the tables above and any 5′-wing may be paired with any gap and any 3′-wing. For example, in certain embodiments, a 5′-wing may comprise AAABB, a 3′-wing may comprise BBA, and the gap may comprise DDDDDDD. For example, in certain embodiments, a gapmer has a 5′-wing, a gap, and a 3′-wing having features selected from among those listed in the following non-limiting table, wherein each motif is represented as (5′-wing)-(gap)-(3′-wing), wherein each number represents the number of linked nucleosides in each portion of the motif, for example, a 5-10-5 motif would have a 5′-wing comprising 5 nucleosides, a gap comprising 10 nucleosides, and a 3′-wing comprising 5 nucleosides:

TABLE 5 Certain Gapmer Sugar Motifs Certain Gapmer Sugar Motifs 2-10-2 3-10-2 4-10-2 5-10-2 2-10-3 3-10-3 4-10-3 5-10-3 2-10-4 3-10-4 4-10-4 5-10-4 2-10-5 3-10-5 4-10-5 5-10-5 2-9-2 3-9-2 4-9-2 5-9-2 2-9-3 3-9-3 4-9-3 5-9-3 2-9-4 3-9-4 4-9-4 5-9-4 2-9-5 3-9-5 4-9-5 5-9-5 2-11-2 3-11-2 4-11-2 5-11-2 2-11-3 3-11-3 4-11-3 5-11-3 2-11-4 3-11-4 4-11-4 5-11-4 2-11-5 3-11-5 4-11-5 5-11-5 2-8-2 3-8-2 4-8-2 5-8-2 2-8-3 3-8-3 4-8-3 5-8-3 2-8-4 3-8-4 4-8-4 5-8-4 2-8-5 3-8-5 4-8-5 5-8-5

In certain embodiments, a gapmer comprises a 5′-wing, a gap, and a 3′ wing, wherein the 5′-wing, gap, and 3′ wing are independently selected from among those discussed above. For example, in certain embodiments, a gapmer has a 5′-wing, a gap, and a 3′-wing having features selected from among those listed in the following non-limiting tables:

TABLE 6 Certain Gapmer Nucleoside Motifs 5′-wing region Central gap region 3′-wing region ADDA DDDDDD ABB ABBA DDDADDDD ABAA AAAAAAA DDDDDDDDDDD AAA AAAAABB DDDDDDDD BBAAAAA ABB DDDDADDDD ABB ABB DDDDBDDDD BBA ABB DDDDDDDDD BBA AABAA DDDDDDDDD AABAA ABB DDDDDD AABAA AAABAA DDDDDDDDD AAABAA AAABAA DDDDDDDDD AAB ABAB DDDDDDDDD ABAB AAABB DDDDDDD BBA ABADB DDDDDDD BBA ABA DBDDDDDDD BBA ABA DADDDDDDD BBA ABAB DDDDDDDD BBA AA DDDDDDDD BBBBBBBB ABB DDDDDD ABADB AAAAB DDDDDDD BAAAA ABBB DDDDDDDDD AB AB DDDDDDDDD BBBA ABBB DDDDDDDDD BBBA AB DDDDDDDD ABA ABB DDDDWDDDD BBA AAABB DDDWDDD BBAAA ABB DDDDWWDDD BBA ABADB DDDDDDD BBA ABBDC DDDDDDD BBA ABBDDC DDDDDD BBA ABBDCC DDDDDD BBA ABB DWWDWWDWW BBA ABB DWDDDDDDD BBA ABB DDWDDDDDD BBA ABB DWWDDDDDD BBA AAABB DDWDDDDDD AA BB DDWDWDDDD BBABBBB ABB DDDD(^(N)D)DDDD BBA AAABB DDD(^(N)D)DDD BBAAA ABB DDDD(^(N)D)(^(N)D)DDD BBA ABB D(^(N)D)(^(N)D)D(^(N)D)(^(N)D)D(^(N)D)(^(N)D) BBA ABB D(^(N)D)DDDDDDD BBA ABB DD(^(N)D)DDDDDD BBA ABB D(^(N)D)(^(N)D)DDDDDD BBA AAABB DD(^(N)D)DDDDDD AA BB DD(^(N)D)D(^(N)D)DDDD BBABBBB ABAB DDDDDDDDD BABA

TABLE 7 Certain Gapmer Nucleoside Motifs 5′-wing region Central gap region 3′-wing region ABBW DDDDDDDD BBA ABB DWDDDDDDD BBA ABB DDWDDDDDD BBA ABB DDDWDDDDD BBA ABB DDDDWDDDD BBA ABB DDDDDWDDD BBA ABB DDDDDDWDD BBA ABB DDDDDDDWD BBA ABB DDDDDDDD WBBA ABBWW DDDDDDD BBA ABB DWWDDDDDD BBA ABB DDWWDDDDD BBA ABB DDDWWDDDD BBA ABB DDDDWWDDD BBA ABB DDDDDWWDD BBA ABB DDDDDDWWD BBA ABB DDDDDDD WWBBA ABBW DDDDDDD WBBA ABBW DDDDDDWD BBA ABBW DDDDDWDD BBA ABBW DDDDWDDD BBA ABBW DDDWDDDD BBA ABBW DDWDDDDD BBA ABBW DWDDDDDD BBA ABB DWDDDDDD WBBA ABB DWDDDDDWD BBA ABB DWDDDDWDD BBA ABB DWDDDWDDD BBA ABB DWDDWDDDD BBA ABB DWDWDDDDD BBA ABB DDWDDDDD WBBA ABB DDWDDDDWD BBA ABB DDWDDDWDD BBA ABB DDWDDWDDD BBA ABB DDWDWDDDD BBA ABB DDWWDDDDD BBA ABB DDDWDDDD WBBA ABB DDDWDDDWD BBA ABB DDDWDDWDD BBA ABB DDDWDWDDD BBA ABB DDDWWDDDD BBA ABB DDDDWDDD WBBA ABB DDDDWDDWD BBA ABB DDDDWDWDD BBA ABB DDDDWWDDD BBA ABB DDDDDWDD WBBA ABB DDDDDWDWD BBA ABB DDDDDWWDD BBA ABB DDDDDDWD WBBA

TABLE 8 Certain Gapmer Nucleoside Motifs 5′-wing region Central gap region 3′-wing region ABBB DDDDDDDD BBA ABB DBDDDDDDD BBA ABB DDBDDDDDD BBA ABB DDDBDDDDD BBA ABB DDDDBDDDD BBA ABB DDDDDBDDD BBA ABB DDDDDDBDD BBA ABB DDDDDDDBD BBA ABB DDDDDDDD BBBA ABBBB DDDDDDD BBA ABB DBBDDDDDD BBA ABB DDBBDDDDD BBA ABB DDDBBDDDD BBA ABB DDDDBBDDD BBA ABB DDDDDBBDD BBA ABB DDDDDDBBD BBA ABB DDDDDDD BBBBA ABBB DDDDDDD BBBA ABB DDDDDDBD BBA ABBB DDDDDBDD BBA ABBB DDDDBDDD BBA ABBB DDDBDDDD BBA ABBB DDBDDDDD BBA ABBB DBDDDDDD BBA ABB DBDDDDDD BBBA ABB DBDDDDDBD BBA ABB DBDDDDBDD BBA ABB DBDDDBDDD BBA ABB DBDDBDDDD BBA ABB DBDBDDDDD BBA ABB DDBDDDDD BBBA ABB DDBDDDDBD BBA ABB DDBDDDBDD BBA ABB DDBDDBDDD BBA ABB DDBDBDDDD BBA ABB DDBBDDDDD BBA ABB DDDBDDDD BBBA ABB DDDBDDDBD BBA ABB DDDBDDBDD BBA ABB DDDBDBDDD BBA ABB DDDBBDDDD BBA ABB DDDDBDDD BBBA ABB DDDDBDDBD BBA ABB DDDDBDBDD BBA ABB DDDDBBDDD BBA ABB DDDDDBDD BBBA ABB DDDDDBDBD BBA ABB DDDDDBBDD BBA ABB DDDDDDBD BBBA

TABLE 9 Certain Gapmer Nucleoside Motifs 5′-wing region Central gap region 3′-wing region ABB DDDDDDDDD BBA AB DBDDDDDDDD BBA AB DDBDDDDDDD BBA AB DDDBDDDDDD BBA AB DDDDBDDDDD BBA AB DDDDDBDDDD BBA AB DDDDDDBDDD BBA AB DDDDDDDBDD BBA AB DDDDDDDDBD BBA AB DDDDDDDDD BBBA ABBB DDDDDDDD BBA AB DBBDDDDDDD BBA AB DDBBDDDDDD BBA AB DDDBBDDDDD BBA AB DDDDBBDDDD BBA AB DDDDDBBDDD BBA AB DDDDDDBBDD BBA AB DDDDDDDBBD BBA AB DDDDDDDD BBBBA ABBBB DDDDDDD BBA AB DBBBDDDDDD BBA AB DDBBBDDDDD BBA AB DDDBBBDDDD BBA AB DDDDBBBDDD BBA AB DDDDDBBBDD BBA AB DDDDDDBBBD BBA AB DDDDDDD BBBBBA AB DDDDDDDDD BBBA AB DDDDDDDBD BBBA AB DDDDDBDD BBBA AB DDDDBDDD BBBA AB DDDBDDDD BBBA AB DDBDDDDD BBBA AB DBDDDDDD BBBA AB DDDDDBD BBBBA AB DDDDBDD BBBBA AB DDDBDDD BBBBA AB DDBDDDD BBBBA AB DBDDDDD BBBBA AB DDDDBD BBBBBA AB DDDBDD BBBBBA AB DDBDDD BBBBBA AB DBDDDD BBBBBA

TABLE 10 Certain Gapmer Nucleoside Motifs 5′-wing region Central gap region 3′-wing region AAAAAA DDDDDDD BABA AAAAAB DDDDDDD BABA AAAABA DDDDDDD BABA AAABAA DDDDDDD BABA AABAAA DDDDDDD BABA ABAAAA DDDDDDD BABA BAAAAA DDDDDDD BABA ABAAAB DDDDDDD BABA ABAABA DDDDDDD BABA ABABAA DDDDDDD BABA ABBAAA DDDDDDD BABA AABAAB DDDDDDD BABA AABABA DDDDDDD BABA AABBAA DDDDDDD BABA AAABAB DDDDDDD BABA AAABBA DDDDDDD BABA AAAABB DDDDDDD BABA BAAAAB DDDDDDD BABA BAAABA DDDDDDD BABA BAABAA DDDDDDD BABA BABAAA DDDDDDD BABA BBAAAA DDDDDDD BABA BBBAAA DDDDDDD BABA BBABAA DDDDDDD BABA BBAABA DDDDDDD BABA BBAAAB DDDDDDD BABA ABABAB DDDDDDD BABA BBBBAA DDDDDDD BABA BBBABA DDDDDDD BABA BBBAAB DDDDDDD BABA BBBBBA DDDDDDD BABA BBBBAB DDDDDDD BABA AAABBB DDDDDDD BABA AABABB DDDDDDD BABA ABAABB DDDDDDD BABA BAAABB DDDDDDD BABA AABBBB DDDDDDD BABA ABABBB DDDDDDD BABA BAABBB DDDDDDD BABA ABBBBB DDDDDDD BABA BABBBB DDDDDDD BABA BBBBBB DDDDDDD BABA

TABLE 11 Certain Gapmer Nucleoside Motifs 5′-wing region Central gap region 3′-wing region AAAAA DDDDDDD AAAAA AAAAB DDDDDDD AAAAA AAABA DDDDDDD AAAAA AAABB DDDDDDD AAAAA AABAA DDDDDDD AAAAA AABAB DDDDDDD AAAAA AABBA DDDDDDD AAAAA AABBB DDDDDDD AAAAA ABAAA DDDDDDD AAAAA ABAAB DDDDDDD AAAAA ABABA DDDDDDD AAAAA ABABB DDDDDDD AAAAA ABBAA DDDDDDD AAAAA ABBAB DDDDDDD AAAAA ABBBA DDDDDDD AAAAA ABBBB DDDDDDD AAAAA BAAAA DDDDDDD AAAAA BAAAB DDDDDDD AAAAA BAABA DDDDDDD AAAAA BAABB DDDDDDD AAAAA BABAA DDDDDDD AAAAA BABAB DDDDDDD AAAAA BABBA DDDDDDD AAAAA BABBB DDDDDDD AAAAA BBAAA DDDDDDD AAAAA BBAAB DDDDDDD AAAAA BBABA DDDDDDD AAAAA BBABB DDDDDDD AAAAA BBBAA DDDDDDD AAAAA BBBAB DDDDDDD AAAAA BBBBA DDDDDDD AAAAA BBBBB DDDDDDD AAAAA AAAAA DDDDDDD BAAAA AAAAB DDDDDDD BAAAA AAABA DDDDDDD BAAAA AAABB DDDDDDD BAAAA AABAA DDDDDDD BAAAA AABAB DDDDDDD BAAAA AABBA DDDDDDD BAAAA AABBB DDDDDDD BAAAA ABAAA DDDDDDD BAAAA ABAAB DDDDDDD BAAAA ABABA DDDDDDD BAAAA ABABB DDDDDDD BAAAA ABBAA DDDDDDD BAAAA ABBAB DDDDDDD BAAAA ABBBA DDDDDDD BAAAA ABBBB DDDDDDD BAAAA BAAAA DDDDDDD BAAAA BAAAB DDDDDDD BAAAA BAABA DDDDDDD BAAAA BAABB DDDDDDD BAAAA BABAA DDDDDDD BAAAA BABAB DDDDDDD BAAAA BABBA DDDDDDD BAAAA BABBB DDDDDDD BAAAA BBAAA DDDDDDD BAAAA BBAAB DDDDDDD BAAAA BBABA DDDDDDD BAAAA BBABB DDDDDDD BAAAA BBBAA DDDDDDD BAAAA BBBAB DDDDDDD BAAAA BBBBA DDDDDDD BAAAA BBBBB DDDDDDD BAAAA AAAAA DDDDDDD BBAAA AAAAB DDDDDDD BBAAA AAABA DDDDDDD BBAAA AAABB DDDDDDD BBAAA AABAA DDDDDDD BBAAA AABAB DDDDDDD BBAAA AABBA DDDDDDD BBAAA AABBB DDDDDDD BBAAA ABAAA DDDDDDD BBAAA ABAAB DDDDDDD BBAAA ABABA DDDDDDD BBAAA ABABB DDDDDDD BBAAA ABBAA DDDDDDD BBAAA ABBAB DDDDDDD BBAAA ABBBA DDDDDDD BBAAA ABBBB DDDDDDD BBAAA BAAAA DDDDDDD BBAAA BAAAB DDDDDDD BBAAA BAABA DDDDDDD BBAAA BAABB DDDDDDD BBAAA BABAA DDDDDDD BBAAA BABAB DDDDDDD BBAAA BABBA DDDDDDD BBAAA BABBB DDDDDDD BBAAA BBAAA DDDDDDD BBAAA BBAAB DDDDDDD BBAAA BBABA DDDDDDD BBAAA BBABB DDDDDDD BBAAA BBBAA DDDDDDD BBAAA BBBAB DDDDDDD BBAAA BBBBA DDDDDDD BBAAA BBBBB DDDDDDD BBAAA AAAAA DDDDDDD BBBAA AAAAB DDDDDDD BBBAA AAABA DDDDDDD BBBAA AAABB DDDDDDD BBBAA AABAA DDDDDDD BBBAA AABAB DDDDDDD BBBAA AABBA DDDDDDD BBBAA AABBB DDDDDDD BBBAA ABAAA DDDDDDD BBBAA ABAAB DDDDDDD BBBAA ABABA DDDDDDD BBBAA ABABB DDDDDDD BBBAA ABBAA DDDDDDD BBBAA ABBAB DDDDDDD BBBAA ABBBA DDDDDDD BBBAA ABBBB DDDDDDD BBBAA BAAAA DDDDDDD BBBAA BAAAB DDDDDDD BBBAA BAABA DDDDDDD BBBAA BAABB DDDDDDD BBBAA BABAA DDDDDDD BBBAA BABAB DDDDDDD BBBAA BABBA DDDDDDD BBBAA BABBB DDDDDDD BBBAA BBAAA DDDDDDD BBBAA BBAAB DDDDDDD BBBAA BBABA DDDDDDD BBBAA BBABB DDDDDDD BBBAA BBBAA DDDDDDD BBBAA BBBAB DDDDDDD BBBAA BBBBA DDDDDDD BBBAA BBBBB DDDDDDD BBBAA AAAAA DDDDDDD BBBBA AAAAB DDDDDDD BBBBA AAABA DDDDDDD BBBBA AAABB DDDDDDD BBBBA AABAA DDDDDDD BBBBA AABAB DDDDDDD BBBBA AABBA DDDDDDD BBBBA AABBB DDDDDDD BBBBA ABAAA DDDDDDD BBBBA ABAAB DDDDDDD BBBBA ABABA DDDDDDD BBBBA ABABB DDDDDDD BBBBA ABBAA DDDDDDD BBBBA ABBAB DDDDDDD BBBBA ABBBA DDDDDDD BBBBA ABBBB DDDDDDD BBBBA BAAAA DDDDDDD BBBBA BAAAB DDDDDDD BBBBA BAABA DDDDDDD BBBBA BAABB DDDDDDD BBBBA BABAA DDDDDDD BBBBA BABAB DDDDDDD BBBBA BABBA DDDDDDD BBBBA BABBB DDDDDDD BBBBA BBAAA DDDDDDD BBBBA BBAAB DDDDDDD BBBBA BBABA DDDDDDD BBBBA BBABB DDDDDDD BBBBA BBBAA DDDDDDD BBBBA BBBAB DDDDDDD BBBBA BBBBA DDDDDDD BBBBA BBBBB DDDDDDD BBBBA AAAAA DDDDDDD BBBBB AAAAB DDDDDDD BBBBB AAABA DDDDDDD BBBBB AAABB DDDDDDD BBBBB AABAA DDDDDDD BBBBB AABAB DDDDDDD BBBBB AABBA DDDDDDD BBBBB AABBB DDDDDDD BBBBB ABAAA DDDDDDD BBBBB ABAAB DDDDDDD BBBBB ABABA DDDDDDD BBBBB ABABB DDDDDDD BBBBB ABBAA DDDDDDD BBBBB ABBAB DDDDDDD BBBBB ABBBA DDDDDDD BBBBB ABBBB DDDDDDD BBBBB BAAAA DDDDDDD BBBBB BAAAB DDDDDDD BBBBB BAABA DDDDDDD BBBBB BAABB DDDDDDD BBBBB BABAA DDDDDDD BBBBB BABAB DDDDDDD BBBBB BABBA DDDDDDD BBBBB BABBB DDDDDDD BBBBB BBAAA DDDDDDD BBBBB BBAAB DDDDDDD BBBBB BBABA DDDDDDD BBBBB BBABB DDDDDDD BBBBB BBBAA DDDDDDD BBBBB BBBAB DDDDDDD BBBBB BBBBA DDDDDDD BBBBB BBBBB DDDDDDD BBBBB

TABLE 12 Certain Gapmer Nucleoside Motifs 5′-wing region Central gap region 3′-wing region AAAW DDDDDDDD BBA AABW DDDDDDDD BBA ABAW DDDDDDDD BBA ABBW DDDDDDDD BBA BAAW DDDDDDDD BBA BABW DDDDDDDD BBA BBAW DDDDDDDD BBA BBBW DDDDDDDD BBA ABB DDDDDDDD WAAA ABB DDDDDDDD WAAB ABB DDDDDDDD WABA ABB DDDDDDDD WABB ABB DDDDDDDD WBAA ABB DDDDDDDD WBAB ABB DDDDDDDD WBBA ABB DDDDDDDD WBBB AAAWW DDDDDDD BBA AABWW DDDDDDD BBA ABAWW DDDDDDD BBA ABBWW DDDDDDD BBA BAAWW DDDDDDD BBA BABWW DDDDDDD BBA BBAWW DDDDDDD BBA BBBWW DDDDDDD BBA ABB DDDDDDD WWAAA ABB DDDDDDD WWAAB ABB DDDDDDD WWABA ABB DDDDDDD WWABB ABB DDDDDDD WWBAA ABB DDDDDDD WWBAB ABB DDDDDDD WWBBA ABB DDDDDDD WWBBB AAAAW DDDDDDD BBA AAABW DDDDDDD BBA AABAW DDDDDDD BBA AABBW DDDDDDD BBA ABAAW DDDDDDD BBA ABABW DDDDDDD BBA ABBAW DDDDDDD BBA ABBBW DDDDDDD BBA BAAAW DDDDDDD BBA BAABW DDDDDDD BBA BABAW DDDDDDD BBA BABBW DDDDDDD BBA BBAAW DDDDDDD BBA BBABW DDDDDDD BBA BBBAW DDDDDDD BBA BBBBW DDDDDDD WAAAA ABB DDDDDDD WAAAB ABB DDDDDDD WAABA ABB DDDDDDD WAABB ABB DDDDDDD WABAA ABB DDDDDDD WABAB ABB DDDDDDD WABBA ABB DDDDDDD WABBB ABB DDDDDDD WBAAA ABB DDDDDDD WBAAB ABB DDDDDDD WBABA ABB DDDDDDD WBABB ABB DDDDDDD WBBAA ABB DDDDDDD WBBAB ABB DDDDDDD WBBBA ABB DDDDDDD WBBBB wherein each A is a modified nucleoside of a first type, each B is a modified nucleoside of a second type and each W is a modified nucleoside or nucleobase of either the first type, the second type or a third type, each D is a nucleoside comprising an unmodified 2′deoxy sugar moiety and unmodified nucleobase, and ^(N)D is modified nucleoside comprising a modified nucleobase and an unmodified 2′deoxy sugar moiety.

In certain embodiments, each A comprises a modified sugar moiety. In certain embodiments, each A comprises a 2′-substituted sugar moiety. In certain embodiments, each A comprises a 2′-substituted sugar moiety selected from among F, ara-F, OCH₃ and O(CH₂)₂—OCH₃. In certain embodiments, each A comprises a bicyclic sugar moiety. In certain embodiments, each A comprises a bicyclic sugar moiety selected from among cEt, cMOE, LNA, α-L-LNA, ENA and 2′-thio LNA. In certain embodiments, each A comprises a modified nucleobase. In certain embodiments, each A comprises a modified nucleobase selected from among 2-thio-thymidine nucleoside and 5-propyne uridine nucleoside. In certain embodiments, each A comprises an HNA. In certain embodiments, each A comprises an F-HNA. In certain embodiments, each A comprises a 5′-substituted sugar moiety selected from among 5′-Me, and 5′-(R)-Me.

In certain embodiments, each B comprises a modified sugar moiety. In certain embodiments, each B comprises a 2′-substituted sugar moiety. In certain embodiments, each B comprises a 2′-substituted sugar moiety selected from among F, (ara)-F, OCH₃ and O(CH₂)₂—OCH₃. In certain embodiments, each B comprises a bicyclic sugar moiety. In certain embodiments, each B comprises a bicyclic sugar moiety selected from among cEt, cMOE, LNA, α-L-LNA, ENA and 2′-thio LNA. In certain embodiments, each B comprises a modified nucleobase. In certain embodiments, each B comprises a modified nucleobase selected from among 2-thio-thymidine nucleoside and 5-propyne urindine nucleoside. In certain embodiments, each B comprises an HNA. In certain embodiments, each B comprises an F-HNA. In certain embodiments, each B comprises a 5′-substituted sugar moiety selected from among 5′-Me, and 5′-(R)-Me.

In certain embodiments, each C comprises a modified sugar moiety. In certain embodiments, each C comprises a 2′-substituted sugar moiety. In certain embodiments, each C comprises a 2′-substituted sugar moiety selected from among F, (ara)-F, OCH₃ and O(CH₂)₂—OCH₃. In certain embodiments, each C comprises a 5′-substituted sugar moiety. In certain embodiments, each C comprises a 5′-substituted sugar moiety selected from among 5′-Me, and 5′-(R)-Me. In certain embodiments, each C comprises a bicyclic sugar moiety. In certain embodiments, each C comprises a bicyclic sugar moiety selected from among cEt, cMOE, LNA, α-L-LNA, ENA and 2′-thio LNA. In certain embodiments, each C comprises a modified nucleobase. In certain embodiments, each C comprises a modified nucleobase selected from among 2-thio-thymidine and 5-propyne uridine. In certain embodiments, each C comprises a 2-thio-thymidine nucleoside. In certain embodiments, each C comprises an HNA. In certain embodiments, each C comprises an F-HNA.

In certain embodiments, each W comprises a modified sugar moiety. In certain embodiments, each W comprises a 2′-substituted sugar moiety. In certain embodiments, each W comprises a 2′-substituted sugar moiety selected from among F, (ara)-F, OCH₃ and O(CH₂)₂—OCH₃. In certain embodiments, each W comprises a 5′-substituted sugar moiety. In certain embodiments, each W comprises a 5′-substituted sugar moiety selected from among 5′-Me, and 5′-(R)-Me. In certain embodiments, each W comprises a bicyclic sugar moiety. In certain embodiments, each W comprises a bicyclic sugar moiety selected from among cEt, cMOE, LNA, α-L-LNA, ENA and 2′-thio LNA. In certain embodiments, each W comprises a sugar surrogate. In certain embodiments, each W comprises a sugar surrogate selected from among HNA and F-HNA. In certain embodiments, each W comprises a 2-thio-thymidine nucleoside.

In certain embodiments, at least one of A or B comprises a bicyclic sugar moiety, and the other comprises a 2′-substituted sugar moiety. In certain embodiments, one of A or B is an LNA nucleoside and the other of A or B comprises a 2′-substituted sugar moiety. In certain embodiments, one of A or B is a cEt nucleoside and the other of A or B comprises a 2′-substituted sugar moiety. In certain embodiments, one of A or B is an α-L-LNA nucleoside and the other of A or B comprises a 2′-substituted sugar moiety. In certain embodiments, one of A or B is an LNA nucleoside and the other of A or B comprises a 2′-MOE sugar moiety. In certain embodiments, one of A or B is a cEt nucleoside and the other of A or B comprises a 2′-MOE sugar moiety. In certain embodiments, one of A or B is an α-L-LNA nucleoside and the other of A or B comprises a 2′-MOE sugar moiety. In certain embodiments, one of A or B is an LNA nucleoside and the other of A or B comprises a 2′-F sugar moiety. In certain embodiments, one of A or B is a cEt nucleoside and the other of A or B comprises a 2′-F sugar moiety. In certain embodiments, one of A or B is an α-L-LNA nucleoside and the other of A or B comprises a 2′-F sugar moiety. In certain embodiments, one of A or B is an LNA nucleoside and the other of A or B comprises a 2′-(ara)-F sugar moiety. In certain embodiments, one of A or B is a cEt nucleoside and the other of A or B comprises a 2′-(ara)-F sugar moiety. In certain embodiments, one of A or B is an α-L-LNA nucleoside and the other of A or B comprises a 2′-(ara)-F sugar moiety.

In certain embodiments, A comprises a bicyclic sugar moiety, and B comprises a 2′-substituted sugar moiety. In certain embodiments, A is an LNA nucleoside and B comprises a 2′-substituted sugar moiety. In certain embodiments, A is a cEt nucleoside and B comprises a 2′-substituted sugar moiety. In certain embodiments, A is an α-L-LNA nucleoside and B comprises a 2′-substituted sugar moiety.

In certain embodiments, A comprises a bicyclic sugar moiety, and B comprises a 2′-MOE sugar moiety. In certain embodiments, A is an LNA nucleoside and B comprises a 2′-MOE sugar moiety. In certain embodiments, A is a cEt nucleoside and B comprises a 2′-MOE sugar moiety. In certain embodiments, A is an α-L-LNA nucleoside and B comprises a 2′-MOE sugar moiety.

In certain embodiments, A comprises a bicyclic sugar moiety, and B comprises a 2′-F sugar moiety. In certain embodiments, A is an LNA nucleoside and B comprises a 2′-F sugar moiety. In certain embodiments, A is a cEt nucleoside and B comprises a 2′-F sugar moiety. In certain embodiments, A is an α-L-LNA nucleoside and B comprises a 2′-F sugar moiety.

In certain embodiments, A comprises a bicyclic sugar moiety, and B comprises a 2′-(ara)-F sugar moiety. In certain embodiments, A is an LNA nucleoside and B comprises a 2′-(ara)-F sugar moiety. In certain embodiments, A is a cEt nucleoside and B comprises a 2′-(ara)-F sugar moiety. In certain embodiments, A is an α-L-LNA nucleoside and B comprises a 2′-(ara)-F sugar moiety.

In certain embodiments, B comprises a bicyclic sugar moiety, and A comprises a 2′-MOE sugar moiety. In certain embodiments, B is an LNA nucleoside and A comprises a 2′-MOE sugar moiety. In certain embodiments, B is a cEt nucleoside and A comprises a 2′-MOE sugar moiety. In certain embodiments, B is an α-L-LNA nucleoside and A comprises a 2′-MOE sugar moiety.

In certain embodiments, B comprises a bicyclic sugar moiety, and A comprises a 2′-F sugar moiety. In certain embodiments, B is an LNA nucleoside and A comprises a 2′-F sugar moiety. In certain embodiments, B is a cEt nucleoside and A comprises a 2′-F sugar moiety. In certain embodiments, B is an α-L-LNA nucleoside and A comprises a 2′-F sugar moiety.

In certain embodiments, B comprises a bicyclic sugar moiety, and A comprises a 2′-(ara)-F sugar moiety. In certain embodiments, B is an LNA nucleoside and A comprises a 2′-(ara)-F sugar moiety. In certain embodiments, B is a cEt nucleoside and A comprises a 2′-(ara)-F sugar moiety. In certain embodiments, B is an α-L-LNA nucleoside and A comprises a 2′-(ara)-F sugar moiety.

In certain embodiments, at least one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-substituted sugar moiety and W comprises a modified nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-substituted sugar moiety, and W comprises a modified nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-substituted sugar moiety, and C comprises a modified nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-substituted sugar moiety, and W comprises a modified nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a modified nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a modified nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a modified nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a modified nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-F sugar moiety, and W comprises a modified nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a modified nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a modified nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a modified nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a modified nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a modified nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a modified nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a modified nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-substituted sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-substituted sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-substituted sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-substituted sugar moiety, and W comprises a 2-thio-thymidine nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 2-thio-thymidine nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-F sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 2-thio-thymidine nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises 2-thio-thymidine nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 5-propyne uridine nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and C comprises a 5-propyne uridine nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 5-propyne uridine nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and C comprises a 5-propyne uridine nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5-propyne uridine nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and C comprises a 5-propyne uridine nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5-propyne uridine nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5-propyne uridine nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5-propyne uridine nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5-propyne uridine nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5-propyne uridine nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5-propyne uridine nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a sugar surrogate. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a sugar surrogate. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a sugar surrogate. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a sugar surrogate.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-F sugar moiety, and W comprises a sugar surrogate. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a sugar surrogate. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a sugar surrogate. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a sugar surrogate.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a sugar surrogate. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a sugar surrogate. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a sugar surrogate. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises sugar surrogate.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a HNA sugar surrogate. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a HNA sugar surrogate. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a HNA sugar surrogate. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a HNA sugar surrogate.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-F sugar moiety, and W comprises a HNA sugar surrogate. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a HNA sugar surrogate. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a HNA sugar surrogate. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a sugar HNA surrogate.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a HNA sugar surrogate. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a HNA sugar surrogate. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a HNA sugar surrogate. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a HNA sugar surrogate.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a F-HNA sugar surrogate. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a F-HNA sugar surrogate. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a F-HNA sugar surrogate. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a F-HNA sugar surrogate.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-F sugar moiety, and W comprises a F-HNA sugar surrogate. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a F-HNA sugar surrogate. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a F-HNA sugar surrogate. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a F-HNA sugar surrogate.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a F-HNA sugar surrogate. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a F-HNA sugar surrogate. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a F-HNA sugar surrogate. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a F-HNA sugar surrogate.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 5′-Me DNA sugar moiety. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 5′-Me DNA sugar moiety. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 5′-Me DNA sugar moiety. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 5′-Me DNA sugar moiety.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5′-Me DNA sugar moiety. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5′-Me DNA sugar moiety. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5′-Me DNA sugar moiety. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5′-Me DNA sugar moiety.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5′-Me DNA sugar moiety. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5′-Me DNA sugar moiety. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5′-Me DNA sugar moiety. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5′-Me DNA sugar moiety.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety.

In certain embodiments, at least two of A, B or W comprises a 2′-substituted sugar moiety, and the other comprises a bicyclic sugar moiety. In certain embodiments, at least two of A, B or W comprises a bicyclic sugar moiety, and the other comprises a 2′-substituted sugar moiety. In certain embodiments, a gapmer has a sugar motif other than: E-K-K-(D)₉-K-K-E; E-E-E-E-K-(D)₉-E-E-E-E-E; E-K-K-K-(D)₉-K-K-K-E; K-E-E-K-(D)₉-K-E-E-K; K-D-D-K-(D)₉-K-D-D-K; K-E-K-E-K-(D)₉-K-E-K-E-K; K-D-K-D-K-(D)₉-K-D-K-D-K; E-K-E-K-(D)₉-K-E-K-E; E-E-E-E-E-K-(D)₈-E-E-E-E-E; or E-K-E-K-E-(D)₉-E-K-E-K-E, E-E-E-K-K-(D)₇-E-E-K, E-K-E-K-K-K-(D)₇-K-E-K-E, E-K-E-K-E-K-(D)₇-K-E-K-E, wherein K is a nucleoside comprising a cEt sugar moiety and E is a nucleoside comprising a 2′-MOE sugar moiety.

In certain embodiments a gapmer comprises a A-(D)₄-A-(D)₄-A-(D)₄-AA motif. In certain embodiments a gapmer comprises a B-(D)₄-A-(D)₄-A-(D)₄-AA motif. In certain embodiments a gapmer comprises a A-(D)₄-B-(D)₄-A-(D)₄-AA motif. In certain embodiments a gapmer comprises a A-(D)₄-A-(D)₄-B-(D)₄-AA motif. In certain embodiments a gapmer comprises a A-(D)₄-A-(D)₄-A-(D)₄-BA motif. In certain embodiments a gapmer comprises a A-(D)₄-A-(D)₄-A-(D)₄-BB motif. In certain embodiments a gapmer comprises a K-(D)₄-K-(D)₄-K-(D)₄-K-E motif

xi. Certain Internucleoside Linkage Motifs

In certain embodiments, oligonucleotides comprise modified internucleoside linkages arranged along the oligonucleotide or region thereof in a defined pattern or modified internucleoside linkage motif. In certain embodiments, internucleoside linkages are arranged in a gapped motif, as described above for nucleoside motif. In such embodiments, the internucleoside linkages in each of two wing regions are different from the internucleoside linkages in the gap region. In certain embodiments the internucleoside linkages in the wings are phosphodiester and the internucleoside linkages in the gap are phosphorothioate. The nucleoside motif is independently selected, so such oligonucleotides having a gapped internucleoside linkage motif may or may not have a gapped nucleoside motif and if it does have a gapped nucleoside motif, the wing and gap lengths may or may not be the same.

In certain embodiments, oligonucleotides comprise a region having an alternating internucleoside linkage motif. In certain embodiments, oligonucleotides of the present invention comprise a region of uniformly modified internucleoside linkages. In certain such embodiments, the oligonucleotide comprises a region that is uniformly linked by phosphorothioate internucleoside linkages. In certain embodiments, the oligonucleotide is uniformly linked by phosphorothioate. In certain embodiments, each internucleoside linkage of the oligonucleotide is selected from phosphodiester and phosphorothioate. In certain embodiments, each internucleoside linkage of the oligonucleotide is selected from phosphodiester and phosphorothioate and at least one internucleoside linkage is phosphorothioate.

In certain embodiments, the oligonucleotide comprises at least 6 phosphorothioate internucleoside linkages. In certain embodiments, the oligonucleotide comprises at least 8 phosphorothioate internucleoside linkages. In certain embodiments, the oligonucleotide comprises at least 10 phosphorothioate internucleoside linkages. In certain embodiments, the oligonucleotide comprises at least one block of at least 6 consecutive phosphorothioate internucleoside linkages. In certain embodiments, the oligonucleotide comprises at least one block of at least 8 consecutive phosphorothioate internucleoside linkages. In certain embodiments, the oligonucleotide comprises at least one block of at least 10 consecutive phosphorothioate internucleoside linkages. In certain embodiments, the oligonucleotide comprises at least block of at least one 12 consecutive phosphorothioate internucleoside linkages. In certain such embodiments, at least one such block is located at the 3′ end of the oligonucleotide. In certain such embodiments, at least one such block is located within 3 nucleosides of the 3′ end of the oligonucleotide.

In certain embodiments, oligonucleotides comprise one or more methylphosponate linkages. In certain embodiments, oligonucleotides having a gapmer nucleoside motif comprise a linkage motif comprising all phosphorothioate linkages except for one or two methylphosponate linkages. In certain embodiments, one methylphosponate linkage is in the central gap of an oligonucleotide having a gapmer nucleoside motif

xii. Certain Modification Motifs

Modification motifs define oligonucleotides by nucleoside motif (sugar motif and nucleobase motif) and linkage motif. For example, certain oligonucleotides have the following modification motif:

-   -   A_(s)A_(s)A_(s)D_(s)D_(s)D_(s)D_(s)(^(N)D)_(s)D_(s)D_(s)D_(s)D_(s)B_(s)B_(s)B;         wherein each A is a modified nucleoside comprising a         2′-substituted sugar moiety; each D is an unmodified         2′-deoxynucleoside; each B is a modified nucleoside comprising a         bicyclic sugar moiety; ^(N)D is a modified nucleoside comprising         a modified nucleobase; and s is a phosphorothioate         internucleoside linkage. Thus, the sugar motif is a gapmer         motif. The nucleobase modification motif is a single modified         nucleobase at 8^(th) nucleoside from the 5′-end. Combining the         sugar motif and the nucleobase modification motif, the         nucleoside motif is an interrupted gapmer where the gap of the         sugar modified gapmer is interrupted by a nucleoside comprising         a modified nucleobase. The linkage motif is uniform         phosphorothioate. The following non-limiting Table further         illustrates certain modification motifs:

TABLE 13 Certain Modification Motifs 5′-wing region Central gap region 3′-wing region B_(s)B_(s) _(s)D_(s)D_(s)D_(s)D_(s)D_(s)D_(s)D_(s)D_(s)D_(s) A_(s)A_(s)A_(s)A_(s)A_(s)A_(s)A_(s)A AsBsBs DsDsDsDsDsDsDsDsDs BsBsA AsBsBs DsDsDsDs(^(N)D)sDsDsDsDs BsBsA AsBsBs DsDsDsDsAsDsDsDsDs BsBsA AsBsBs DsDsDsDsBsDsDsDsDs BsBsA AsBsBs DsDsDsDsWsDsDsDsDs BsBsA AsBsBsBs DsDsDsDsDsDsDsDsDs BsBsAsBsB AsBsBs DsDsDsDsDsDsDsDsDs BsBsAsBsB BsBsAsBsBs DsDsDsDsDsDsDsDsDs BsBsA AsBsBs DsDsDsDsDsDsDsDsDs BsBsAsBsBsBsB AsAsBsAsAs DsDsDsDsDsDsDsDsDs BsBsA AsAsAsBsAsAs DsDsDsDsDsDsDsDsDs BsBsA AsAsBsAsAs DsDsDsDsDsDsDsDsDs AsAsBsAsA AsAsAsBsAsAs DsDsDsDsDsDsDsDsDs AsAsBsAsAsA AsAsAsAsBsAsAs DsDsDsDsDsDsDsDsDs BsBsA AsBsAsBs DsDsDsDsDsDsDsDsDs BsAsBsA AsBsAsBs DsDsDsDsDsDsDsDsDs AsAsBsAsAs AsBsBs DsDsDsDsDsDsDsDsDs BsAsBsA BsBsAsBsBsBsB DsDsDsDsDsDsDsDsDs BsAsBsA AsAsAsAsAs DsDsDsDsDsDsDsDsDs AsAsAsAsA AsAsAsAsAs DsDsDsDsDsDsDs AsAsAsAsA AsAsAsAsAs DsDsDsDsDsDsDsDsDs BsBsAsBsBsBsB AsAsAsBsBs DsDsDsDsDsDsDs BsBsA AsBsAsBs DsDsDsDsDsDsDsDs BsBsA AsBsAsBs DsDsDsDsDsDsDs AsAsAsBsBs AsAsAsAsBs DsDsDsDsDsDsDs BsAsAsAsA BsBs DsDsDsDsDsDsDsDs AsA AsAs DsDsDsDsDsDsDs AsAsAsAsAsAsAsA AsAsAs DsDsDsDsDsDsDs AsAsAsAsAsAsA AsAsAs DsDsDsDsDsDsDs AsAsAsAsAsA AsBs DsDsDsDsDsDsDs BsBsBsA AsBsBsBs DsDsDsDsDsDsDsDsDs BsA AsBs DsDsDsDsDsDsDsDsDs BsBsBsA AsAsAsBsBs DsDsDs(^(N)D)sDsDsDs BsBsAsAsA AsAsAsBsBs DsDsDsAsDsDsDs BsBsAsAsA AsAsAsBsBs DsDsDsBsDsDsDs BsBsAsAsA AsAsAsAsBs DsDsDsDsDsDsDs BsAsAsAsA AsAsBsBsBs DsDsDsDsDsDsDs BsBsBsAsA AsAsAsAsBs DsDsDsDsDsDsDs AsAsAsAsAs AsAsAsBsBs DsDsDsDsDsDsDs AsAsAsAsAs AsAsBsBsBs DsDsDsDsDsDsDs AsAsAsAsAs AsAsAsAsAs DsDsDsDsDsDsDs BsAsAsAsAs AsAsAsAsAs DsDsDsDsDsDsDs BsBsAsAsAs AsAsAsAsAs DsDsDsDsDsDsDs BsBsBsAsAs AsBsBs DsDsDsDs(^(N)D)s(^(N)D)sDsDsDs BsBsA AsBsBs Ds(^(N)D)s(^(N)D)sDs(^(N)D)s(^(N)D)sDs(^(N)D)s(^(N)D)s BsBsA AsBsBs Ds(^(N)D)sDsDsDsDsDsDsDs BsBsA AsBsBs DsDs(^(N)D)sDsDsDsDsDsDs BsBsA AsBsBs Ds(^(N)D)s(^(N)D)sDsDsDsDsDsDs BsBsA AsBsBs DsDs(D)zDsDsDsDsDsDs BsBsA AsBsBs Ds(D)zDsDsDsDsDsDsDs BsBsA AsBsBs (D)zDsDsDsDsDsDsDsDs BsBsA AsBsBs DsDsAsDsDsDsDsDsDs BsBsA AsBsBs DsDsBsDsDsDsDsDsDs BsBsA AsBsBs AsDsDsDsDsDsDsDsDs BsBsA AsBsBs BsDsDsDsDsDsDsDsDs BsBsA AsBsAsBs DsDs(D)zDsDsDsDsDsDs BsBsBsAsAs AsAsAsBsBs DsDs(^(N)D)sDsDsDsDsDsDs AsA AsBsBsBs Ds(D)zDsDsDsDsDsDsDs AsAsAsBsBs AsBsBs DsDsDsDsDsDsDsDs(D)z BsBsA AsAsBsBsBs DsDsDsAsDsDsDs BsBsBsAsA AsAsBsBsBs DsDsDsBsDsDsDs BsBsBsAsA AsBsAsBs DsDsDsAsDsDsDs BsBsAsBsBsBsB AsBsBsBs DsDsDsDs(D)zDsDsDsDs BsA AsAsBsBsBs DsDsAsAsDsDsDs BsBsA AsBsBs DsDsDsDs(D)zDsDsDsDs BsBsBsA BsBs DsDs(^(N)D)sDs(^(N)D)sDsDsDsDs BsBsAsBsBsBsB wherein each A and B are nucleosides comprising differently modified sugar moieties, each D is a nucleoside comprising an unmodified 2′deoxy sugar moiety, each W is a modified nucleoside of either the first type, the second type or a third type, each ^(N)D is a modified nucleoside comprising a modified nucleobase, s is a phosphorothioate internucleoside linkage, and z is a non-phosphorothioate internucleoside linkage.

In certain embodiments, each A comprises a modified sugar moiety. In certain embodiments, each A comprises a 2′-substituted sugar moiety. In certain embodiments, each A comprises a 2′-substituted sugar moiety selected from among F, (ara)-F, OCH₃ and O(CH₂)₂—OCH₃. In certain embodiments, each A comprises a bicyclic sugar moiety. In certain embodiments, each A comprises a bicyclic sugar moiety selected from among cEt, cMOE, LNA, α-L-LNA, ENA and 2′-thio LNA. In certain embodiments, each A comprises a modified nucleobase. In certain embodiments, each A comprises a modified nucleobase selected from among 2-thio-thymidine nucleoside and 5-propyne uridine nucleoside. In certain embodiments, each B comprises a modified sugar moiety. In certain embodiments, each B comprises a 2′-substituted sugar moiety. In certain embodiments, each B comprises a 2′-substituted sugar moiety selected from among F, (ara)-F, OCH₃ and O(CH₂)₂—OCH₃. In certain embodiments, each B comprises a bicyclic sugar moiety. In certain embodiments, each B comprises a bicyclic sugar moiety selected from among cEt, cMOE, LNA, α-L-LNA, ENA and 2′-thio LNA. In certain embodiments, each B comprises a modified nucleobase. In certain embodiments, each B comprises a modified nucleobase selected from among 2-thio-thymidine nucleoside and 5-propyne urindine nucleoside. In certain embodiments, each A comprises an HNA. In certain embodiments, each A comprises an F-HNA.

In certain embodiments, each W comprises a modified sugar moiety. In certain embodiments, each W comprises a 2′-substituted sugar moiety. In certain embodiments, each W comprises a 2′-substituted sugar moiety selected from among F, (ara)-F, OCH₃ and O(CH₂)₂—OCH₃. In certain embodiments, each W comprises a 5′-substituted sugar moiety. In certain embodiments, each W comprises a 5′-substituted sugar moiety selected from among 5′-Me, and 5′-(R)-Me. In certain embodiments, each W comprises a bicyclic sugar moiety. In certain embodiments, each W comprises a bicyclic sugar moiety selected from among cEt, cMOE, LNA, α-L-LNA, ENA and 2′-thio LNA. In certain embodiments, each W comprises a sugar surrogate. In certain embodiments, each W comprises a sugar surrogate selected from among HNA and F-HNA.

In certain embodiments, at least one of A or B comprises a bicyclic sugar moiety, and the other comprises a 2′-substituted sugar moiety. In certain embodiments, one of A or B is an LNA nucleoside and the other of A or B comprises a 2′-substituted sugar moiety. In certain embodiments, one of A or B is a cEt nucleoside and the other of A or B comprises a 2′-substituted sugar moiety. In certain embodiments, one of A or B is an α-L-LNA nucleoside and the other of A or B comprises a 2′-substituted sugar moiety. In certain embodiments, one of A or B is an LNA nucleoside and the other of A or B comprises a 2′-MOE sugar moiety. In certain embodiments, one of A or B is a cEt nucleoside and the other of A or B comprises a 2′-MOE sugar moiety. In certain embodiments, one of A or B is an α-L-LNA nucleoside and the other of A or B comprises a 2′-MOE sugar moiety. In certain embodiments, one of A or B is an LNA nucleoside and the other of A or B comprises a 2′-F sugar moiety. In certain embodiments, one of A or B is a cEt nucleoside and the other of A or B comprises a 2′-F sugar moiety. In certain embodiments, one of A or B is an α-L-LNA nucleoside and the other of A or B comprises a 2′-F sugar moiety. In certain embodiments, one of A or B is an LNA nucleoside and the other of A or B comprises a 2′-(ara)-F sugar moiety. In certain embodiments, one of A or B is a cEt nucleoside and the other of A or B comprises a 2′-(ara)-F sugar moiety. In certain embodiments, one of A or B is an α-L-LNA nucleoside and the other of A or B comprises a 2′-(ara)-F sugar moiety.

In certain embodiments, A comprises a bicyclic sugar moiety, and B comprises a 2′-substituted sugar moiety. In certain embodiments, A is an LNA nucleoside and B comprises a 2′-substituted sugar moiety. In certain embodiments, A is a cEt nucleoside and B comprises a 2′-substituted sugar moiety. In certain embodiments, A is an α-L-LNA nucleoside and B comprises a 2′-substituted sugar moiety.

In certain embodiments, A comprises a bicyclic sugar moiety, and B comprises a 2′-MOE sugar moiety. In certain embodiments, A is an LNA nucleoside and B comprises a 2′-MOE sugar moiety. In certain embodiments, A is a cEt nucleoside and B comprises a 2′-MOE sugar moiety. In certain embodiments, A is an α-L-LNA nucleoside and B comprises a 2′-MOE sugar moiety.

In certain embodiments, A comprises a bicyclic sugar moiety, and B comprises a 2′-F sugar moiety. In certain embodiments, A is an LNA nucleoside and B comprises a 2′-F sugar moiety. In certain embodiments, A is a cEt nucleoside and B comprises a 2′-F sugar moiety. In certain embodiments, A is an α-L-LNA nucleoside and B comprises a 2′-F sugar moiety.

In certain embodiments, A comprises a bicyclic sugar moiety, and B comprises a 2′-(ara)-F sugar moiety. In certain embodiments, A is an LNA nucleoside and B comprises a 2′-(ara)-F sugar moiety. In certain embodiments, A is a cEt nucleoside and B comprises a 2′-(ara)-F sugar moiety. In certain embodiments, A is an α-L-LNA nucleoside and B comprises a 2′-(ara)-F sugar moiety.

In certain embodiments, B comprises a bicyclic sugar moiety, and A comprises a 2′-MOE sugar moiety. In certain embodiments, B is an LNA nucleoside and A comprises a 2′-MOE sugar moiety. In certain embodiments, B is a cEt nucleoside and A comprises a 2′-MOE sugar moiety. In certain embodiments, B is an α-L-LNA nucleoside and A comprises a 2′-MOE sugar moiety.

In certain embodiments, B comprises a bicyclic sugar moiety, and A comprises a 2′-F sugar moiety. In certain embodiments, B is an LNA nucleoside and A comprises a 2′-F sugar moiety. In certain embodiments, B is a cEt nucleoside and A comprises a 2′-F sugar moiety. In certain embodiments, B is an α-L-LNA nucleoside and A comprises a 2′-F sugar moiety.

In certain embodiments, B comprises a bicyclic sugar moiety, and A comprises a 2′-(ara)-F sugar moiety. In certain embodiments, B is an LNA nucleoside and A comprises a 2′-(ara)-F sugar moiety. In certain embodiments, B is a cEt nucleoside and A comprises a 2′-(ara)-F sugar moiety. In certain embodiments, B is an α-L-LNA nucleoside and A comprises a 2′-(ara)-F sugar moiety.

In certain embodiments, at least one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-substituted sugar moiety and W comprises a modified nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-substituted sugar moiety, and W comprises a modified nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-substituted sugar moiety, and C comprises a modified nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-substituted sugar moiety, and W comprises a modified nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a modified nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a modified nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a modified nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a modified nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-F sugar moiety, and W comprises a modified nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a modified nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a modified nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a modified nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a modified nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a modified nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a modified nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a modified nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-substituted sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-substituted sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-substituted sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-substituted sugar moiety, and W comprises a 2-thio-thymidine nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 2-thio-thymidine nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-F sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 2-thio-thymidine nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 2-thio-thymidine nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises 2-thio-thymidine nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 5-propyne uridine nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and C comprises a 5-propyne uridine nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 5-propyne uridine nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and C comprises a 5-propyne uridine nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5-propyne uridine nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and C comprises a 5-propyne uridine nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5-propyne uridine nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5-propyne uridine nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5-propyne uridine nucleobase. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5-propyne uridine nucleobase. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5-propyne uridine nucleobase. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5-propyne uridine nucleobase.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a sugar surrogate. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a sugar surrogate. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a sugar surrogate. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a sugar surrogate.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-F sugar moiety, and W comprises a sugar surrogate. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a sugar surrogate. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a sugar surrogate. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a sugar surrogate.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a sugar surrogate. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a sugar surrogate. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a sugar surrogate. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises sugar surrogate.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a HNA sugar surrogate. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a HNA sugar surrogate. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a HNA sugar surrogate. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a HNA sugar surrogate.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-F sugar moiety, and W comprises a HNA sugar surrogate. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a HNA sugar surrogate. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a HNA sugar surrogate. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a sugar HNA surrogate.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a HNA sugar surrogate. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a HNA sugar surrogate. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a HNA sugar surrogate. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a HNA sugar surrogate.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a F-HNA sugar surrogate. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a F-HNA sugar surrogate. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a F-HNA sugar surrogate. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a F-HNA sugar surrogate.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-F sugar moiety, and W comprises a F-HNA sugar surrogate. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a F-HNA sugar surrogate. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a F-HNA sugar surrogate. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a F-HNA sugar surrogate.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a F-HNA sugar surrogate. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a F-HNA sugar surrogate. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a F-HNA sugar surrogate. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a F-HNA sugar surrogate.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 5′-Me DNA sugar moiety. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 5′-Me DNA sugar moiety. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 5′-Me DNA sugar moiety. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 5′-Me DNA sugar moiety.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5′-Me DNA sugar moiety. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5′-Me DNA sugar moiety. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5′-Me DNA sugar moiety. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5′-Me DNA sugar moiety.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5′-Me DNA sugar moiety. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5′-Me DNA sugar moiety. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5′-Me DNA sugar moiety. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5′-Me DNA sugar moiety.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-MOE sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-F sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety.

In certain embodiments, one of A or B comprises a bicyclic sugar moiety, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety. In certain embodiments, one of A or B is an LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety. In certain embodiments, one of A or B is a cEt nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety. In certain embodiments, one of A or B is an α-L-LNA nucleoside, another of A or B comprises a 2′-(ara)-F sugar moiety, and W comprises a 5′-(R)-Me DNA sugar moiety.

In certain embodiments, at least two of A, B or W comprises a 2′-substituted sugar moiety, and the other comprises a bicyclic sugar moiety. In certain embodiments, at least two of A, B or W comprises a bicyclic sugar moiety, and the other comprises a 2′-substituted sugar moiety.

c. Certain Overall Lengths

In certain embodiments, the present invention provides oligomeric compounds including oligonucleotides of any of a variety of ranges of lengths. In certain embodiments, the invention provides oligomeric compounds or oligonucleotides consisting of X to Y linked nucleosides, where X represents the fewest number of nucleosides in the range and Y represents the largest number of nucleosides in the range. In certain such embodiments, X and Y are each independently selected from 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, and 50; provided that X<Y. For example, in certain embodiments, the invention provides oligomeric compounds which comprise oligonucleotides consisting of 8 to 9, 8 to 10, 8 to 11, 8 to 12, 8 to 13, 8 to 14, 8 to 15, 8 to 16, 8 to 17, 8 to 18, 8 to 19, 8 to 20, 8 to 21, 8 to 22, 8 to 23, 8 to 24, 8 to 25, 8 to 26, 8 to 27, 8 to 28, 8 to 29, 8 to 30, 9 to 10, 9 to 11, 9 to 12, 9 to 13, 9 to 14, 9 to 15, 9 to 16, 9 to 17, 9 to 18, 9 to 19, 9 to 20, 9 to 21, 9 to 22, 9 to 23, 9 to 24, 9 to 25, 9 to 26, 9 to 27, 9 to 28, 9 to 29, 9 to 30, 10 to 11, 10 to 12, 10 to 13, 10 to 14, 10 to 15, 10 to 16, 10 to 17, 10 to 18, 10 to 19, 10 to 20, 10 to 21, 10 to 22, 10 to 23, 10 to 24, 10 to 25, 10 to 26, 10 to 27, 10 to 28, 10 to 29, 10 to 30, 11 to 12, 11 to 13, 11 to 14, 11 to 15, 11 to 16, 11 to 17, 11 to 18, 11 to 19, 11 to 20, 11 to 21, 11 to 22, 11 to 23, 11 to 24, 11 to 25, 11 to 26, 11 to 27, 11 to 28, 11 to 29, 11 to 30, 12 to 13, 12 to 14, 12 to 15, 12 to 16, 12 to 17, 12 to 18, 12 to 19, 12 to 20, 12 to 21, 12 to 22, 12 to 23, 12 to 24, 12 to 25, 12 to 26, 12 to 27, 12 to 28, 12 to 29, 12 to 30, 13 to 14, 13 to 15, 13 to 16, 13 to 17, 13 to 18, 13 to 19, 13 to 20, 13 to 21, 13 to 22, 13 to 23, 13 to 24, 13 to 25, 13 to 26, 13 to 27, 13 to 28, 13 to 29, 13 to 30, 14 to 15, 14 to 16, 14 to 17, 14 to 18, 14 to 19, 14 to 20, 14 to 21, 14 to 22, 14 to 23, 14 to 24, 14 to 25, 14 to 26, 14 to 27, 14 to 28, 14 to 29, 14 to 30, 15 to 16, 15 to 17, 15 to 18, 15 to 19, 15 to 20, 15 to 21, 15 to 22, 15 to 23, 15 to 24, 15 to 25, 15 to 26, 15 to 27, 15 to 28, 15 to 29, 15 to 30, 16 to 17, 16 to 18, 16 to 19, 16 to 20, 16 to 21, 16 to 22, 16 to 23, 16 to 24, 16 to 25, 16 to 26, 16 to 27, 16 to 28, 16 to 29, 16 to 30, 17 to 18, 17 to 19, 17 to 20, 17 to 21, 17 to 22, 17 to 23, 17 to 24, 17 to 25, 17 to 26, 17 to 27, 17 to 28, 17 to 29, 17 to 30, 18 to 19, 18 to 20, 18 to 21, 18 to 22, 18 to 23, 18 to 24, 18 to 25, 18 to 26, 18 to 27, 18 to 28, 18 to 29, 18 to 30, 19 to 20, 19 to 21, 19 to 22, 19 to 23, 19 to 24, 19 to 25, 19 to 26, 19 to 29, 19 to 28, 19 to 29, 19 to 30, 20 to 21, 20 to 22, 20 to 23, 20 to 24, 20 to 25, 20 to 26, 20 to 27, 20 to 28, 20 to 29, 20 to 30, 21 to 22, 21 to 23, 21 to 24, 21 to 25, 21 to 26, 21 to 27, 21 to 28, 21 to 29, 21 to 30, 22 to 23, 22 to 24, 22 to 25, 22 to 26, 22 to 27, 22 to 28, 22 to 29, 22 to 30, 23 to 24, 23 to 25, 23 to 26, 23 to 27, 23 to 28, 23 to 29, 23 to 30, 24 to 25, 24 to 26, 24 to 27, 24 to 28, 24 to 29, 24 to 30, 25 to 26, 25 to 27, 25 to 28, 25 to 29, 25 to 30, 26 to 27, 26 to 28, 26 to 29, 26 to 30, 27 to 28, 27 to 29, 27 to 30, 28 to 29, 28 to 30, or 29 to 30 linked nucleosides. In embodiments where the number of nucleosides of an oligomeric compound or oligonucleotide is limited, whether to a range or to a specific number, the oligomeric compound or oligonucleotide may, nonetheless further comprise additional other substituents. For example, an oligonucleotide comprising 8-30 nucleosides excludes oligonucleotides having 31 nucleosides, but, unless otherwise indicated, such an oligonucleotide may further comprise, for example one or more conjugates, terminal groups, or other substituents. In certain embodiments, a gapmer oligonucleotide has any of the above lengths.

Further, where an oligonucleotide is described by an overall length range and by regions having specified lengths, and where the sum of specified lengths of the regions is less than the upper limit of the overall length range, the oligonucleotide may have additional nucleosides, beyond those of the specified regions, provided that the total number of nucleosides does not exceed the upper limit of the overall length range.

d. Certain Oligonucleotides

In certain embodiments, oligonucleotides of the present invention are characterized by their modification motif and overall length. In certain embodiments, such parameters are each independent of one another. Thus, unless otherwise indicated, each internucleoside linkage of an oligonucleotide having a gapmer sugar motif may be modified or unmodified and may or may not follow the gapmer modification pattern of the sugar modifications. For example, the internucleoside linkages within the wing regions of a sugar-gapmer may be the same or different from one another and may be the same or different from the internucleoside linkages of the gap region. Likewise, such sugar-gapmer oligonucleotides may comprise one or more modified nucleobase independent of the gapmer pattern of the sugar modifications. One of skill in the art will appreciate that such motifs may be combined to create a variety of oligonucleotides. Herein if a description of an oligonucleotide or oligomeric compound is silent with respect to one or more parameter, such parameter is not limited. Thus, an oligomeric compound described only as having a gapmer sugar motif without further description may have any length, internucleoside linkage motif, and nucleobase modification motif. Unless otherwise indicated, all chemical modifications are independent of nucleobase sequence.

e. Certain Conjugate Groups

In certain embodiments, oligomeric compounds are modified by attachment of one or more conjugate groups. In general, conjugate groups modify one or more properties of the attached oligomeric compound including but not limited to pharmacodynamics, pharmacokinetics, stability, binding, absorption, cellular distribution, cellular uptake, charge and clearance. Conjugate groups are routinely used in the chemical arts and are linked directly or via an optional conjugate linking moiety or conjugate linking group to a parent compound such as an oligomeric compound, such as an oligonucleotide. Conjugate groups includes without limitation, intercalators, reporter molecules, polyamines, polyamides, polyethylene glycols, thioethers, polyethers, cholesterols, thiocholesterols, cholic acid moieties, folate, lipids, phospholipids, biotin, phenazine, phenanthridine, anthraquinone, adamantane, acridine, fluoresceins, rhodamines, coumarins and dyes. Certain conjugate groups have been described previously, for example: cholesterol moiety (Letsinger et al., Proc. Natl. Acad. Sci. USA, 1989, 86, 6553-6556), cholic acid (Manoharan et al., Bioorg. Med. Chem. Let., 1994, 4, 1053-1060), a thioether, e.g., hexyl-S-tritylthiol (Manoharan et al., Ann. N.Y. Acad. Sci., 1992, 660, 306-309; Manoharan et al., Bioorg. Med. Chem. Let., 1993, 3, 2765-2770), a thiocholesterol (Oberhauser et al., Nucl. Acids Res., 1992, 20, 533-538), an aliphatic chain, e.g., do-decan-diol or undecyl residues (Saison-Behmoaras et al., EMBO J., 1991, 10, 1111-1118; Kabanov et al., FEBS Lett., 1990, 259, 327-330; Svinarchuk et al., Biochimie, 1993, 75, 49-54), a phospholipid, e.g., di-hexadecyl-rac-glycerol or triethyl-ammonium 1,2-di-O-hexadecyl-rac-glycero-3-H-phosphonate (Manoharan et al., Tetrahedron Lett., 1995, 36, 3651-3654; Shea et al., Nucl. Acids Res., 1990, 18, 3777-3783), a polyamine or a polyethylene glycol chain (Manoharan et al., Nucleosides & Nucleotides, 1995, 14, 969-973), or adamantane acetic acid (Manoharan et al., Tetrahedron Lett., 1995, 36, 3651-3654), a palmityl moiety (Mishra et al., Biochim. Biophys. Acta, 1995, 1264, 229-237), or an octadecylamine or hexylamino-carbonyl-oxycholesterol moiety (Crooke et al., J. Pharmacol. Exp. Ther., 1996, 277, 923-937).

In certain embodiments, a conjugate group comprises an active drug substance, for example, aspirin, warfarin, phenylbuazone, ibuprofen, suprofen, fen-bufen, ketoprofen, (S)-(+)-pranoprofen, carprofen, dansylsarcosine, 2,3,5-triiodobenzoic acid, flufenamic acid, folinic acid, a benzothiadiazide, chlorothiazide, a diazepine, indo-methicin, a barbiturate, a cephalosporin, a sulfa drug, an antidiabetic, an antibacterial or an antibiotic.

In certain embodiments, conjugate groups are directly attached to oligonucleotides in oligomeric compounds. In certain embodiments, conjugate groups are attached to oligonucleotides by a conjugate linking group. In certain such embodiments, conjugate linking groups, including, but not limited to, bifunctional linking moieties such as those known in the art are amenable to the compounds provided herein. Conjugate linking groups are useful for attachment of conjugate groups, such as chemical stabilizing groups, functional groups, reporter groups and other groups to selective sites in a parent compound such as for example an oligomeric compound. In general a bifunctional linking moiety comprises a hydrocarbyl moiety having two functional groups. One of the functional groups is selected to bind to a parent molecule or compound of interest and the other is selected to bind essentially any selected group such as chemical functional group or a conjugate group. In some embodiments, the conjugate linker comprises a chain structure or an oligomer of repeating units such as ethylene glycol or amino acid units. Examples of functional groups that are routinely used in a bifunctional linking moiety include, but are not limited to, electrophiles for reacting with nucleophilic groups and nucleophiles for reacting with electrophilic groups. In some embodiments, bifunctional linking moieties include amino, hydroxyl, carboxylic acid, thiol, unsaturations (e.g., double or triple bonds), and the like.

Some nonlimiting examples of conjugate linking moieties include pyrrolidine, 8-amino-3,6-dioxaoctanoic acid (ADO), succinimidyl 4-(N-maleimidomethyl) cyclohexane-1-carboxylate (SMCC) and 6-aminohexanoic acid (AHEX or AHA). Other linking groups include, but are not limited to, substituted C₁-C₁₀ alkyl, substituted or unsubstituted C₂-C₁₀ alkenyl or substituted or unsubstituted C₂-C₁₀ alkynyl, wherein a nonlimiting list of preferred substituent groups includes hydroxyl, amino, alkoxy, carboxy, benzyl, phenyl, nitro, thiol, thioalkoxy, halogen, alkyl, aryl, alkenyl and alkynyl.

Conjugate groups may be attached to either or both ends of an oligonucleotide (terminal conjugate groups) and/or at any internal position.

In certain embodiments, conjugate groups are at the 3′-end of an oligonucleotide of an oligomeric compound. In certain embodiments, conjugate groups are near the 3′-end. In certain embodiments, conjugates are attached at the 3′end of an oligomeric compound, but before one or more terminal group nucleosides. In certain embodiments, conjugate groups are placed within a terminal group.

In certain embodiments, the present invention provides oligomeric compounds. In certain embodiments, oligomeric compounds comprise an oligonucleotide. In certain embodiments, an oligomeric compound comprises an oligonucleotide and one or more conjugate and/or terminal groups. Such conjugate and/or terminal groups may be added to oligonucleotides having any of the motifs discussed above. Thus, for example, an oligomeric compound comprising an oligonucleotide having region of alternating nucleosides may comprise a terminal group.

C. Antisense Compounds

In certain embodiments, oligomeric compounds provided herein are antisense compounds. Such antisense compounds are capable of hybridizing to a target nucleic acid, resulting in at least one antisense activity. In certain embodiments, antisense compounds specifically hybridize to one or more target nucleic acid. In certain embodiments, a specifically hybridizing antisense compound has a nucleobase sequence comprising a region having sufficient complementarity to a target nucleic acid to allow hybridization and result in antisense activity and insufficient complementarity to any non-target so as to avoid non-specific hybridization to any non-target nucleic acid sequences under conditions in which specific hybridization is desired (e.g., under physiological conditions for in vivo or therapeutic uses, and under conditions in which assays are performed in the case of in vitro assays).

In certain embodiments, the present invention provides antisense compounds comprising oligonucleotides that are fully complementary to the target nucleic acid over the entire length of the oligonucleotide. In certain embodiments, oligonucleotides are 99% complementary to the target nucleic acid. In certain embodiments, oligonucleotides are 95% complementary to the target nucleic acid. In certain embodiments, such oligonucleotides are 90% complementary to the target nucleic acid.

In certain embodiments, such oligonucleotides are 85% complementary to the target nucleic acid. In certain embodiments, such oligonucleotides are 80% complementary to the target nucleic acid. In certain embodiments, an antisense compound comprises a region that is fully complementary to a target nucleic acid and is at least 80% complementary to the target nucleic acid over the entire length of the oligonucleotide. In certain such embodiments, the region of full complementarity is from 6 to 14 nucleobases in length.

a. Certain Antisense Activities and Mechanisms

In certain antisense activities, hybridization of an antisense compound results in recruitment of a protein that cleaves of the target nucleic acid. For example, certain antisense compounds result in RNase H mediated cleavage of target nucleic acid. RNase H is a cellular endonuclease that cleaves the RNA strand of an RNA:DNA duplex. The “DNA” in such an RNA:DNA duplex, need not be unmodified DNA. In certain embodiments, the invention provides antisense compounds that are sufficiently “DNA-like” to elicit RNase H activity. Such DNA-like antisense compounds include, but are not limited to gapmers having unmodified deoxyfuronose sugar moieties in the nucleosides of the gap and modified sugar moieties in the nucleosides of the wings.

Antisense activities may be observed directly or indirectly. In certain embodiments, observation or detection of an antisense activity involves observation or detection of a change in an amount of a target nucleic acid or protein encoded by such target nucleic acid; a change in the ratio of splice variants of a nucleic acid or protein; and/or a phenotypic change in a cell or animal.

In certain embodiments, compounds comprising oligonucleotides having a gapmer nucleoside motif described herein have desirable properties compared to non-gapmer oligonucleotides or to gapmers having other motifs. In certain circumstances, it is desirable to identify motifs resulting in a favorable combination of potent antisense activity and relatively low toxicity. In certain embodiments, compounds of the present invention have a favorable therapeutic index (measure of activity divided by measure of toxicity).

b. Certain Selective Antisense Compounds

In certain embodiments, antisense compounds provided are selective for a target relative to a non-target nucleic acid. In certain embodiments, the nucleobase sequences of the target and non-target nucleic acids differ by no more than 4 differentiating nucleobases in the targeted region. In certain embodiments, the nucleobase sequences of the target and non-target nucleic acids differ by no more than 3 differentiating nucleobases in the targeted region. In certain embodiments, the nucleobase sequences of the target and non-target nucleic acids differ by no more than 2 differentiating nucleobases in the targeted region. In certain embodiments, the nucleobase sequences of the target and non-target nucleic acids differ by a single differentiating nucleobase in the targeted region. In certain embodiments, the target and non-target nucleic acids are transcripts from different genes. In certain embodiments, the target and non-target nucleic acids are different alleles for the same gene. In certain embodiments, the introduction of a mismatch between an antisense compound and a non-target nucleic acid may alter the RNase H cleavage site of a target nucleic acid compared to a non-target nucleic acid. In certain embodiments, the target and non-target nucleic acids are not functionally related to one another (e.g., are transcripts from different genes). In certain embodiments, the target and not-target nucleic acids are allelic variants of one another. In certain embodiments, the allelic variant contains a single nucleotide polymorphism (SNP). In certain embodiments, a SNP is associated with a mutant allele. In certain embodiments, a mutant SNP is associated with a disease. In certain embodiments a mutant SNP is associated with a disease, but is not causative of the disease. In certain embodiments, mRNA and protein expression of a mutant allele is associated with disease.

Selectivity of antisense compounds is achieved, principally, by nucleobase complementarity. For example, if an antisense compound has no mismatches for a target nucleic acid and one or more mismatches for a non-target nucleic acid, some amount of selectivity for the target nucleic acid will result. In certain embodiments, provided herein are antisense compounds with enhanced selectivity (i.e. the ratio of activity for the target to the activity for non-target is greater). For example, in certain embodiments, a selective nucleoside comprises a particular feature or combination of features (e.g., chemical modification, motif, placement of selective nucleoside, and/or self-complementary region) that increases selectivity of an antisense compound compared to an antisense compound not having that feature or combination of features. In certain embodiments, such feature or combination of features increases antisense activity for the target. In certain embodiments, such feature or combination of features decreases activity for the target, but decreases activity for the non-target by a greater amount, thus resulting in an increase in selectivity.

Without being limited by mechanism, enhanced selectivity may result from a larger difference in the affinity of an antisense compound for its target compared to its affinity for the non-target and/or a larger difference in RNase H activity for the resulting duplexes. For example, in certain embodiments, a selective antisense compound comprises a modified nucleoside at that same position as a differentiating nucleobase (i.e., the selective nucleoside is modified). That modification may increase the difference in binding affinity of the antisense compound for the target relative to the non-target. In addition or in the alternative, the chemical modification may increase the difference in RNAse H activity for the duplex formed by the antisense compound and its target compared to the RNase activity for the duplex formed by the antisense compound and the non-target. For example, the modification may exaggerate a structure that is less compatible for RNase H to bind, cleave and/or release the non-target.

In certain embodiments, an antisense compound binds its intended target to form a target duplex. In certain embodiments, RNase H cleaves the target nucleic acid of the target duplex. In certain such embodiments, there is a primary cleavage site between two particular nucleosides of the target nucleic acid (the primary target cleavage site), which accounts for the largest amount of cleavage of the target nucleic acid. In certain embodiments, there are one or more secondary target cleavage sites. In certain embodiments, the same antisense compound hybridizes to a non-target to form a non-target duplex. In certain such embodiments, the non-target differs from the target by a single nucleobase within the target region, and so the antisense compound hybridizes with a single mismatch. Because of the mismatch, in certain embodiments, RNase H cleavage of the non-target may be reduced compared to cleavage of the target, but still occurs. In certain embodiments, though, the primary site of that cleavage of the non-target nucleic acid (primary non-target cleavage site) is different from that of the target. That is; the primary site is shifted due to the mismatch. In such a circumstance, one may use a modification placed in the antisense compound to disrupt RNase H cleavage at the primary non-target cleavage site. Such modification will result in reduced cleavage of the non-target, but will result little or no decrease in cleavage of the target. In certain embodiments, the modification is a modified sugar, nucleobase and/or linkage.

In certain embodiments, the primary non-target cleavage site is towards the 5′-end of the antisense compound, and the 5′-end of an antisense compound may be modified to prevent RNaseH cleavage. In this manner, it is thought that one having skill in the art may modify the 5′-end of an antisense compound, or modify the nucleosides in the gap region of the 5′-end of the antisense compound, or modify the 3′-most 5′-region nucleosides of the antisense compound to selectively inhibit RNaseH cleavage of the non-target nucleic acid duplex while retaining RNase H cleavage of the target nucleic acid duplex. In certain embodiments, 1-3 of the 3′-most 5′-region nucleosides of the antisense compound comprises a bicyclic sugar moiety.

For example, in certain embodiments the target nucleic acid may have an allelic variant, e.g. a non-target nucleic acid, containing a single nucleotide polymorphism. An antisense compound may be designed having a single nucleobase mismatch from the non-target nucleic acid, but which has full complementarity to the target nucleic acid. The mismatch between the antisense compound and the non-target nucleic acid may destabilize the antisense compound non-target nucleic acid duplex, and consequently the cleavage site of RNaseH may shift upstream towards the 5′-end of the antisense compound. Modification of the 5′-end of the antisense compound or the gap region near the 5′-end of the antisense compound, or one or more of the 3′-most nucleosides of the 5′-wing region, will then prevent RNaseH cleavage of the non-target nucleic acid. Since the target nucleic acid is fully complementary to the antisense compound, the antisense compound and the target nucleic acid will form a more stabilized antisense compound-target nucleic acid duplex and the cleavage site of RnaseH will be more downstream, towards the 3′ end of the antisense compound. Accordingly, modifications at the 5′-end of the antisense compound will prevent RNaseH cleavage of the non-target nucleic acid, but will not substantially effect RNaseH cleavage of the target nucleic acid, and selectivity between a target nucleic acid and its allelic variant may be achieved. In certain embodiments, one or more of the 3′-most nucleosides of the 5′-wing region comprises a bicyclic sugar moiety. In certain embodiments, one or more of the 3′-most nucleosides of the 5′-wing region comprises a bicyclic sugar moiety selected from cEt and LNA. In certain embodiments, one or more of the 3′-most nucleosides of the 5′-wing region comprises cEt. In certain embodiments, one or more of the 3′-most nucleosides of the 5′-wing region comprises LNA.

In certain embodiments, the introduction of a mismatch between an antisense compound and a target nucleic acid may alter the RNase H cleavage site of a target nucleic acid compared to a non-target nucleic acid by shifting the RNaseH cleavage site downstream from the mismatch site and towards the 3′-end of the antisense compound. In certain embodiments where the cleavage site of a target nucleic acid compared to a non-target nucleic acid has shifted downstream towards the 3′-end of the antisense compound, the 3′-end of an antisense compound may be modified to prevent RNaseH cleavage. In this manner, it is thought that one having skill in the art may modify the 3′-end of an antisense compound, or modify the nucleosides in the gap region near the 3′-end of antisense compound, to selectively inhibit RNaseH cleavage of the non-target nucleic acid while retaining RNase H cleavage of the target nucleic acid.

For example, in certain embodiments the target nucleic acid may have an allelic variant, e.g. a non-target nucleic acid, containing a single nucleotide polymorphism. An antisense compound may be designed having a single nucleobase mismatch from the non-target nucleic acid, but which has full complementarity to target nucleic acid. The mismatch between the antisense compound and the non-target nucleic acid may destabilize the antisense compound-non-target nucleic acid duplex, and consequently the cleavage site of RNaseH may shift downstream towards the 3′-end of the antisense compound. Modification of the 3′-end of the antisense compound, or one or more of the 5′-most nucleosides of the 3′-wing region, or the gap region of the antisense compound near the 3′-end will then prevent RNaseH cleavage of the non-target nucleic acid. Since the target nucleic acid is fully complementary to the antisense compound, the antisense compound and the target nucleic acid will form a more stabilized antisense compound-target nucleic acid duplex and the cleavage site of RnaseH will be more upstream, towards the 5′ end of the antisense compound. Accordingly, modifications at the 3′-end of the antisense compound will prevent RNaseH cleavage of the non-target nucleic acid, but will not substantially effect RNaseH cleavage of the target nucleic acid, and selectivity between a target nucleic acid and its allelic variant may be achieved. In certain embodiments, one or more of the 5′-most nucleosides of the 3′-wing region comprises a bicyclic sugar moiety. In certain embodiments, one or more of the 5′-most nucleosides of the 3′-wing region comprises a bicyclic sugar moiety selected from cEt and LNA. In certain embodiments, one or more of the 5′-most nucleosides of the 3′-wing region comprises cEt. In certain embodiments, one or more of the 5′-most nucleosides of the 3′-wing region comprises LNA.

In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or longer, may be improved by the addition of one or more bicyclic nucleosides at the 3′-most 5′-wing nucleoside. In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or longer, may be improved by the addition of two or more bicyclic nucleosides at the 3′-most 5′-wing nucleoside. In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or longer, may be improved by the addition of one bicyclic nucleoside at the 3′-most 5′-wing nucleoside. In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or longer, may be improved by the addition of two bicyclic nucleosides at the 3′-most 5′-wing nucleoside. In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or longer, may be improved by the addition of three bicyclic nucleosides at the 3′-most 5′-wing nucleoside. In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or longer, may be improved by the addition of four bicyclic nucleosides at the 3′-most 5′-wing nucleoside. In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or longer, may be improved by the addition of five bicyclic nucleosides at the 3′-most 5′-wing nucleoside. In certain embodiments discussed above, the bicyclic nucleosides at the 3′-most 5′-wing nucleoside are selected from among cEt, cMOE, LNA, α-LNA, ENA and 2′-thio LNA. In certain embodiments discussed above, the bicyclic nucleosides at the 3′-most 5′-wing nucleoside comprise cEt. In certain embodiments discussed above, the bicyclic nucleosides at the 3′-most 5′-wing nucleoside comprise LNA.

In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or longer, may be improved by the addition of one or more bicyclic nucleosides at the 3′-most 5′-wing nucleoside and the addition of one or more bicyclic nucleosides at the 5′-most 3′-wing nucleoside. In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or longer, may be improved by the addition of two or more bicyclic nucleosides at the 3′-most 5′-wing nucleoside and the addition of one or more bicyclic nucleosides at the 5′-most 3′-wing nucleoside. In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or longer, may be improved by the addition of one bicyclic nucleoside at the 3′-most 5′-wing nucleoside and the addition of one or more bicyclic nucleosides at the 5′-most 3′-wing nucleoside. In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or longer, may be improved by the addition of two bicyclic nucleosides at the 3′-most 5′-wing nucleoside and the addition of one or more bicyclic nucleosides at the 5′-most 3′-wing nucleoside. In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or longer, may be improved by the addition of three bicyclic nucleosides at the 3′-most 5′-wing nucleoside and the addition of one or more bicyclic nucleosides at the 5′-most 3′-wing nucleoside. In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or longer, may be improved by the addition of four bicyclic nucleosides at the 3′-most 5′-wing nucleoside and the addition of one or more bicyclic nucleosides at the 5′-most 3′-wing nucleoside. In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or longer, may be improved by the addition of four bicyclic nucleosides at the 3′-most 5′-wing nucleoside and the addition of one or more bicyclic nucleosides at the 5′-most 3′-wing nucleoside.

In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or shorter, may be improved by the addition of one or more bicyclic nucleosides at the 3′-most 5′-wing nucleoside. In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or shorter, may be improved by the addition of two or more bicyclic nucleosides at the 3′-most 5′-wing nucleoside. In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or shorter, may be improved by the addition of one bicyclic nucleoside at the 3′-most 5′-wing nucleoside. In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or shorter, may be improved by the addition of two bicyclic nucleosides at the 3′-most 5′-wing nucleoside. In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or shorter, may be improved by the addition of three bicyclic nucleosides at the 3′-most 5′-wing nucleoside. In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or shorter, may be improved by the addition of four bicyclic nucleosides at the 3′-most 5′-wing nucleoside. In certain embodiments, the selectivity of antisense compounds having certain gaps, e.g. gaps of 7 nucleosides or shorter, may be improved by the addition of five bicyclic nucleosides at the 3′-most 5′-wing nucleoside. In certain embodiments discussed above, the bicyclic nucleosides at the 3′-most 5′-wing nucleoside are selected from among cEt, cMOE, LNA, α-LNA, ENA and 2′-thio LNA. In certain embodiments discussed above, the bicyclic nucleosides at the 3′-most 5′-wing nucleoside comprise cEt. In certain embodiments discussed above, the bicyclic nucleosides at the 3′-most 5′-wing nucleoside comprise LNA.

Antisense compounds having certain specified motifs have enhanced selectivity, including, but not limited to motifs described above. In certain embodiments, enhanced selectivity is achieved by oligonucleotides comprising any one or more of:

a modification motif comprising a long 5′-wing (longer than 5, 6, or 7 nucleosides);

a modification motif comprising a long 3′-wing (longer than 5, 6, or 7 nucleosides);

a modification motif comprising a short gap region (shorter than 8, 7, or 6 nucleosides); and

a modification motif comprising an interrupted gap region (having no uninterrupted stretch of unmodified 2′-deoxynucleosides longer than 7, 6 or 5).

i. Certain Selective Nucleobase Sequence Elements

In certain embodiments, selective antisense compounds comprise nucleobase sequence elements. Such nucleobase sequence elements are independent of modification motifs. Accordingly, oligonucleotides having any of the motifs (modification motifs, nucleoside motifs, sugar motifs, nucleobase modification motifs, and/or linkage motifs) may also comprise one or more of the following nucleobase sequence elements.

ii. Alignment of Differentiating Nucleobase/Target-Selective Nucleoside

In certain embodiments, a target region and a region of a non-target nucleic acid differ by 1-4 differentiating nucleobase. In such embodiments, selective antisense compounds have a nucleobase sequence that aligns with the non-target nucleic acid with 1-4 mismatches. A nucleoside of the antisense compound that corresponds to a differentiating nucleobase of the target nucleic acid is referred to herein as a target-selective nucleoside. In certain embodiments, selective antisense compounds having a gapmer motif align with a non-target nucleic acid, such that a target-selective nucleoside is positioned in the gap. In certain embodiments, a target-selective nucleoside is the 1^(st) nucleoside of the gap from the 5′ end. In certain embodiments, a target-selective nucleoside is the 2^(nd) nucleoside of the gap from the 5′ end. In certain embodiments, a target-selective nucleoside is the 3^(rd) nucleoside of the gap from the 5′-end. In certain embodiments, a target-selective nucleoside is the 4^(th) nucleoside of the gap from the 5′-end. In certain embodiments, a target-selective nucleoside is the 5^(th) nucleoside of the gap from the 5′-end. In certain embodiments, a target-selective nucleoside is the 6^(rd) nucleoside of the gap from the 5′-end. In certain embodiments, a target-selective nucleoside is the 8^(th) nucleoside of the gap from the 3′-end. In certain embodiments, a target-selective nucleoside is the 7^(th) nucleoside of the gap from the 3′-end. In certain embodiments, a target-selective nucleoside is the 6^(th) nucleoside of the gap from the 3′-end. In certain embodiments, a target-selective nucleoside is the 5^(th) nucleoside of the gap from the 3′-end. In certain embodiments, a target-selective nucleoside is the 4^(th) nucleoside of the gap from the 3′-end. In certain embodiments, a target-selective nucleoside is the 3^(rd) nucleoside of the gap from the 3′-end. In certain embodiments, a target-selective nucleoside is the 2^(nd) nucleoside of the gap from the 3′-end.

In certain embodiments, a target-selective nucleoside comprises a modified nucleoside. In certain embodiments, a target-selective nucleoside comprises a modified sugar. In certain embodiments, a target-selective nucleoside comprises a sugar surrogate. In certain embodiments, a target-selective nucleoside comprises a sugar surrogate selected from among HNA and F-HNA. In certain embodiments, a target-selective nucleoside comprises a sugar surrogate selected from among F-CeNA, FRNA, and FANA. In certain embodiments, a target-selective nucleoside comprises a 2′-substituted sugar moiety. In certain embodiments, a target-selective nucleoside comprises a 2′-substituted sugar moiety selected from among MOE, F and (ara)-F. In certain embodiments, a target-selective nucleoside comprises a 5′-substituted sugar moiety. In certain embodiments, a target-selective nucleoside comprises a 5′-substituted sugar moiety selected from 5′-(R)-Me DNA. In certain embodiments, a target-selective nucleoside comprises a 5′-substituted sugar moiety selected from 5′-(S)-Me DNA. In certain embodiments, a target-selective nucleoside comprises a bicyclic sugar moiety. In certain embodiments, a target-selective nucleoside comprises a bicyclic sugar moiety selected from among cEt, and α-L-LNA. In certain embodiments, a target-selective nucleoside comprises a modified nucleobase. In certain embodiments, a target-selective nucleoside comprises a modified nucleobase selected from among 2-thio-thymidine and 5-propyne uridine.

In certain embodiments, a modification at position 4 from the 5′-end increases selectivity. In certain embodiments, a modification at position 5 from the 5′-end increases selectivity. In certain embodiments, a modification at position 7 from the 5′-end increases selectivity. In certain embodiments, a modification at position 8 from the 5′-end increases potency and selectivity. In certain embodiments, a modification at position 9 from the 5′-end increases potency. In certain embodiments, a modification at position 10 from the 5′-end increases selectivity. In certain embodiments, a modification at position 11 from the 5′-end increases selectivity. In certain embodiments, a modification at position 12 from the 5′-end increases potency. In certain embodiments, an S-5′-Me-DNA modification increases allele selectivity.

iii. Mismatches to the Target Nucleic Acid

In certain embodiments, selective antisense compounds comprise one or more mismatched nucleobases relative to the target nucleic acid. In certain such embodiments, antisense activity against the target is reduced by such mismatch, but activity against the non-target is reduced by a greater amount. Thus, in certain embodiments selectivity is improved. Any nucleobase other than the differentiating nucleobase is suitable for a mismatch. In certain embodiments, however, the mismatch is specifically positioned within the gap of an oligonucleotide having a gapmer motif. In certain embodiments, a mismatch relative to the target nucleic acid is at positions 1, 2, 3, 4, 5, 6, 7, or 8 from the 5′-end of the gap region. In certain embodiments, a mismatch relative to the target nucleic acid is at positions 9, 8, 7, 6, 5, 4, 3, 2, 1 of the antisense compounds from the 3′-end of the gap region. In certain embodiments, a mismatch relative to the target nucleic acid is at positions 1, 2, 3, or 4 of the antisense compounds from the 5′-end of the wing region. In certain embodiments, a mismatch relative to the target nucleic acid is at positions 4, 3, 2, or 1 of the antisense compounds from the 3′-end of the wing region.

iv. Self Complementary Regions

In certain embodiments, selective antisense compounds comprise a region that is not complementary to the target. In certain embodiments, such region is complementary to another region of the antisense compound. Such regions are referred to herein as self-complementary regions. For example, in certain embodiments, an antisense compound has a first region at one end that is complementary to a second region at the other end. In certain embodiments, one of the first and second regions is complementary to the target nucleic acid. Unless the target nucleic acid also includes a self-complementary region, the other of the first and second region of the antisense compound will not be complementary to the target nucleic acid. For illustrative purposes, certain antisense compounds have the following nucleobase motif:

-   -   ABCXXXXXXXXXC′B′A′;     -   ABCXXXXXXX(X/C′)(X/B′)(X/A′);     -   (X/A)(X/B)(X/C)XXXXXXXXXC′B′A′         where each of A, B, and C are any nucleobase; A′, B′, and C′ are         the complementary bases to A, B, and C, respectively; each X is         a nucleobase complementary to the target nucleic acid; and two         letters in parentheses (e.g., (X/C′)) indicates that the         nucleobase is complementary to the target nucleic acid and to         the designated nucleoside within the antisense oligonucleotide.

Without being bound to any mechanism, in certain embodiments, such antisense compounds are expected to form self-structure, which is disrupted upon contact with a target nucleic acid. Contact with a non-target nucleic acid is expected to disrupt the self-structure to a lesser degree, thus increasing selectivity compared to the same antisense compound lacking the self-complementary regions.

v. Combinations of Features

Though it is clear to one of skill in the art, the above motifs and other elements for increasing selectivity may be used alone or in combination. For example, a single antisense compound may include any one, two, three, or more of: self-complementary regions, a mismatch relative to the target nucleic acid, a short nucleoside gap, an interrupted gap, and specific placement of the selective nucleoside.

D. Certain Target Nucleic Acids

In certain embodiments, antisense compounds comprise or consist of an oligonucleotide comprising a region that is complementary to a target nucleic acid. In certain embodiments, the target nucleic acid is an endogenous RNA molecule. In certain embodiments, the target nucleic acid is a non-coding RNA. In certain such embodiments, the target non-coding RNA is selected from: a long-non-coding RNA, a short non-coding RNA, an intronic RNA molecule, a snoRNA, a scaRNA, a microRNA (including pre-microRNA and mature microRNA), a ribosomal RNA, and promoter directed RNA. In certain embodiments, the target nucleic acid encodes a protein. In certain such embodiments, the target nucleic acid is selected from: an mRNA and a pre-mRNA, including intronic, exonic and untranslated regions. In certain embodiments, oligomeric compounds are at least partially complementary to more than one target nucleic acid. For example, antisense compounds of the present invention may mimic microRNAs, which typically bind to multiple targets.

In certain embodiments, the target nucleic acid is a nucleic acid other than a mature mRNA. In certain embodiments, the target nucleic acid is a nucleic acid other than a mature mRNA or a microRNA. In certain embodiments, the target nucleic acid is a non-coding RNA other than a microRNA. In certain embodiments, the target nucleic acid is a non-coding RNA other than a microRNA or an intronic region of a pre-mRNA. In certain embodiments, the target nucleic acid is a long non-coding RNA. In certain embodiments, the target RNA is an mRNA. In certain embodiments, the target nucleic acid is a pre-mRNA. In certain such embodiments, the target region is entirely within an intron. In certain embodiments, the target region spans an intron/exon junction. In certain embodiments, the target region is at least 50% within an intron. In certain embodiments, the target nucleic acid is selected from among non-coding RNA, including exonic regions of pre-mRNA. In certain embodiments, the target nucleic acid is a ribosomal RNA (rRNA). In certain embodiments, the target nucleic acid is a non-coding RNA associated with splicing of other pre-mRNAs. In certain embodiments, the target nucleic acid is a nuclear-retained non-coding RNA.

In certain embodiments, antisense compounds described herein are complementary to a target nucleic acid comprising a single-nucleotide polymorphism. In certain such embodiments, the antisense compound is capable of modulating expression of one allele of the single-nucleotide polymorphism-containing-target nucleic acid to a greater or lesser extent than it modulates another allele. In certain embodiments an antisense compound hybridizes to a single-nucleotide polymorphism-containing-target nucleic acid at the single-nucleotide polymorphism site. In certain embodiments, the target nucleic acid is a Huntingtin gene transcript. In certain embodiments, the target nucleic acid is a single-nucleotide polymorphism-containing-target nucleic acid of a Huntingtin gene transcript. In certain embodiments, the target nucleic acid is not a Huntingtin gene transcript. In certain embodiments, the target nucleic acid is a single-nucleotide polymorphism-containing-target nucleic acid of a gene transcript other than Huntingtin. In certain embodiments, the target nucleic acid is any nucleic acid other than a Huntingtin gene transcript.

a. Single-Nucleotide Polymorphism

In certain embodiments, the invention provides selective antisense compounds that have greater activity for a target nucleic acid than for a homologous or partially homologous non-target nucleic acid. In certain such embodiments, the target and non-target nucleic acids are not functionally related to one another (e.g., are transcripts from different genes). In certain embodiments, the target and not-target nucleic acids are allelic variants of one another. Certain embodiments of the present invention provide methods, compounds, and compositions for selectively inhibiting mRNA and protein expression of an allelic variant of a particular gene or DNA sequence. In certain embodiments, the allelic variant contains a single nucleotide polymorphism (SNP). In certain embodiments, a SNP is associated with a mutant allele. In certain embodiments, a mutant SNP is associated with a disease. In certain embodiments a mutant SNP is associated with a disease, but is not causative of the disease. In certain embodiments, mRNA and protein expression of a mutant allele is associated with disease.

In certain embodiments, the expressed gene product of a mutant allele results in aggregation of the mutant proteins causing disease. In certain embodiments, the expressed gene product of a mutant allele results in gain of function causing disease. In certain embodiments, genes with an autosomal dominant mutation resulting in a toxic gain of function of the protein are the APP gene encoding amyloid precursor protein involved in Alzheimer's disease (Gene, 371: 68, 2006); the PrP gene encoding prion protein involved in Creutzfeldt-Jakob disease and in fatal familial insomnia (Nat. Med. 1997, 3: 1009); GFAP gene encoding glial fibrillary acidic protein involved in Alexander disease (J. Neurosci. 2006, 26:111623); alpha-synuclein gene encoding alpha-synuclein protein involved in Parkinson's disease (J. Clin. Invest. 2003, 111: 145); SOD-1 gene encoding the SOD-1 protein involved in amyotrophic lateral sclerosis (Science 1998, 281: 1851); atrophin-1 gene encoding atrophin-1 protein involved in dentato-rubral and pallido-luysian atrophy (DRPA) (Trends Mol. Med. 2001, 7: 479); SCA1 gene encoding ataxin-1 protein involved in spino-cerebellar ataxia-1 (SCA1) (Protein Sci. 2003, 12: 953); PLP gene encoding proteolipid protein involved in Pelizaeus-Merzbacher disease (NeuroMol Med. 2007, 4: 73); DYT1 gene encoding torsinA protein involved in Torsion dystonia (Brain Res. 2000, 877: 379); and alpha-B crystalline gene encoding alpha-B crystalline protein involved in protein aggregation diseases, including cardiomyopathy (Cell 2007, 130: 427); alpha1-antitrypsin gene encoding alpha1-antitrypsin protein involved in chronic obstructive pulmonary disease (COPD), liver disease and hepatocellular carcinoma (New Engl J Med. 2002, 346: 45); Ltk gene encoding leukocyte tyrosine kinase protein involved in systemic lupus erythematosus (Hum. Mol. Gen. 2004, 13: 171); PCSK9 gene encoding PCSK9 protein involved in hypercholesterolemia (Hum Mutat. 2009, 30: 520); prolactin receptor gene encoding prolactin receptor protein involved in breast tumors (Proc. Natl. Assoc. Sci. 2008, 105: 4533); CCL5 gene encoding the chemokine CCL5 involved in COPD and asthma (Eur. Respir. J. 2008, 32: 327); PTPN22 gene encoding PTPN22 protein involved in Type 1 diabetes, Rheumatoid arthritis, Graves disease, and SLE (Proc. Natl. Assoc. Sci. 2007, 104: 19767); androgen receptor gene encoding the androgen receptor protein involved in spinal and bulbar muscular atrophy or Kennedy's disease (J Steroid Biochem. Mol. Biol. 2008, 108: 245); CHMP4B gene encoding chromatin modifying protein-4B involved in progressive childhood posterior subcapsular cataracts (Am. J. Hum. Genet 2007, 81: 596); FXR/NR1H4 gene encoding Farnesoid X receptor protein involved in cholesterol gallstone disease, arthrosclerosis and diabetes (Mol. Endocrinol. 2007, 21: 1769); ABCA1 gene encoding ABCA1 protein involved in cardiovascular disease (Transl. Res. 2007, 149: 205); CaSR gene encoding the calcium sensing receptor protein involved in primary hypercalciuria (Kidney Int. 2007, 71: 1155); alpha-globin gene encoding alpha-globin protein involved in alpha-thallasemia (Science 2006, 312: 1215); httlpr gene encoding HTTLPR protein involved in obsessive compulsive disorder (Am. J. Hum. Genet. 2006, 78: 815); AVP gene encoding arginine vasopressin protein in stress-related disorders such as anxiety disorders and comorbid depression (CNS Neurol. Disord. Drug Targets 2006, 5: 167); GNAS gene encoding G proteins involved in congenital visual defects, hypertension, metabolic syndrome (Trends Pharmacol. Sci. 2006, 27: 260); APAF1 gene encoding APAF1 protein involved in a predisposition to major depression (Mol. Psychiatry 2006, 11: 76); TGF-beta1 gene encoding TGF-beta1 protein involved in breast cancer and prostate cancer (Cancer Epidemiol. Biomarkers Prev. 2004, 13: 759); AChR gene encoding acetylcholine receptor involved in congential myasthenic syndrome (Neurology 2004, 62: 1090); P2Y12 gene encoding adenosine diphosphate (ADP) receptor protein involved in risk of peripheral arterial disease (Circulation 2003, 108: 2971); LQT1 gene encoding LQT1 protein involved in atrial fibrillation (Cardiology 2003, 100: 109); RET protooncogene encoding RET protein involved in sporadic pheochromocytoma (J. Clin. Endocrinol. Metab. 2003, 88: 4911); filamin A gene encoding filamin A protein involved in various congenital malformations (Nat. Genet. 2003, 33: 487); TARDBP gene encoding TDP-43 protein involved in amyotrophic lateral sclerosis (Hum. Mol. Gene.t 2010, 19: 671); SCA3 gene encoding ataxin-3 protein involved in Machado-Joseph disease (PLoS One 2008, 3: e3341); SCAT gene encoding ataxin-7 protein involved in spino-cerebellar ataxia-7 (PLoS One 2009, 4: e7232); and HTT gene encoding huntingtin protein involved in Huntington's disease (Neurobiol Dis. 1996, 3:183); and the CA4 gene encoding carbonic anhydrase 4 protein, CRX gene encoding cone-rod homeobox transcription factor protein, FSCN2 gene encoding retinal fascin homolog 2 protein, IMPDH1 gene encoding inosine monophosphate dehydrogenase 1 protein, NR2E3 gene encoding nuclear receptor subfamily 2 group E3 protein, NRL gene encoding neural retina leucine zipper protein, PRPF3 (RP18) gene encoding pre-mRNA splicing factor 3 protein, PRPF8 (RP13) gene encoding pre-mRNA splicing factor 8 protein, PRPF31 (RP11) gene encoding pre-mRNA splicing factor 31 protein, RDS gene encoding peripherin 2 protein, ROM1 gene encoding rod outer membrane protein 1 protein, RHO gene encoding rhodopsin protein, RP1 gene encoding RP1 protein, RPGR gene encoding retinitis pigmentosa GTPase regulator protein, all of which are involved in Autosomal Dominant Retinitis Pigmentosa disease (Adv Exp Med Biol. 2008, 613:203)

In certain embodiments, the mutant allele is associated with any disease from the group consisting of Alzheimer's disease, Creutzfeldt-Jakob disease, fatal familial insomnia, Alexander disease, Parkinson's disease, amyotrophic lateral sclerosis, dentato-rubral and pallido-luysian atrophy DRPA, spino-cerebellar ataxia, Torsion dystonia, cardiomyopathy, chronic obstructive pulmonary disease (COPD), liver disease, hepatocellular carcinoma, systemic lupus erythematosus, hypercholesterolemia, breast cancer, asthma, Type 1 diabetes, Rheumatoid arthritis, Graves disease, SLE, spinal and bulbar muscular atrophy, Kennedy's disease, progressive childhood posterior subcapsular cataracts, cholesterol gallstone disease, arthrosclerosis, cardiovascular disease, primary hypercalciuria, alpha-thallasemia, obsessive compulsive disorder, Anxiety, comorbid depression, congenital visual defects, hypertension, metabolic syndrome, prostate cancer, congential myasthenic syndrome, peripheral arterial disease, atrial fibrillation, sporadic pheochromocytoma, congenital malformations, Machado-Joseph disease, Huntington's disease, and Autosomal Dominant Retinitis Pigmentosa disease.

i. Certain Huntingtin Targets

In certain embodiments, an allelic variant of huntingtin is selectively reduced. Nucleotide sequences that encode huntingtin include, without limitation, the following: GENBANK Accession No. NT_006081.18, truncated from nucleotides 1566000 to 1768000 (replaced by GENBANK Accession No. NT_006051), incorporated herein as SEQ ID NO: 1, and NM_002111.6, incorporated herein as SEQ ID NO: 574.

Table 14 provides SNPs found in the GM04022, GM04281, GM02171, and GM02173B cell lines. Also provided are the allelic variants found at each SNP position, the genotype for each of the cell lines, and the percentage of HD patients having a particular allelic variant. For example, the two allelic variants for SNP rs6446723 are T and C. The GM04022 cell line is heterozygous TC, the GM02171 cell line is homozygous CC, the GM02173 cell line is heterozygous TC, and the GM04281 cell line is homozygous TT. Fifty percent of HD patients have a T at SNP position rs6446723.

TABLE 14 Allelic Variations for SNPs Associated with HD SNP Variation GM04022 GM02171 GM02173 GM04281 TargetPOP allele rs6446723 T/C TC CC TC TT 0.50 T rs3856973 A/G AG AA AG GG 0.50 G rs2285086 A/G AG GG AG AA 0.50 A rs363092 A/C AC AA AC CC 0.49 C rs916171 C/G GC GG GC CC 0.49 C rs6844859 T/C TC CC TC TT 0.49 T rs7691627 A/G AG AA AG GG 0.49 G rs4690073 A/G AG AA AG GG 0.49 G rs2024115 A/G AG GG AG AA 0.48 A rs11731237 T/C CC CC TC TT 0.43 T rs362296 A/C CC AC AC AC 0.42 C rs10015979 A/G AA AA AG GG 0.42 G rs7659144 C/G CG CG CG CC 0.41 C rs363096 T/C CC CC TC TT 0.40 T rs362273 A/G AA AG AG AA 0.39 A rs16843804 T/C CC TC TC CC 0.38 C rs362271 A/G GG AG AG GG 0.38 G rs362275 T/C CC TC TC CC 0.38 C rs3121419 T/C CC TC TC CC 0.38 C rs362272 A/G GG — AG GG 0.38 G rs3775061 A/G AA AG AG AA 0.38 A rs34315806 T/C CC TC TC CC 0.38 C rs363099 T/C CC TC TC CC 0.38 C rs2298967 T/C TT TC TC TT 0.38 T rs363088 A/T AA TA TA AA 0.38 A rs363064 T/C CC TC TC CC 0.35 C rs363102 A/G AG AA AA AA 0.23 G rs2798235 A/G AG GG GG GG 0.21 A rs363080 T/C TC CC CC CC 0.21 T rs363072 A/T TA TA AA AA 0.13 A rs363125 A/C AC AC CC CC 0.12 C rs362303 T/C TC TC CC CC 0.12 C rs362310 T/C TC TC CC CC 0.12 C rs10488840 A/G AG AG GG GG 0.12 G rs362325 T/C TC TC TT TT 0.11 T rs35892913 A/G GG GG GG GG 0.10 A rs363102 A/G AG AA AA AA 0.09 A rs363096 T/C CC CC TC TT 0.09 C rs11731237 T/C CC CC TC TT 0.09 C rs10015979 A/G AA AA AG GG 0.08 A rs363080 T/C TC CC CC CC 0.07 C rs2798235 A/G AG GG GG GG 0.07 G rs1936032 C/G GC CC CC CC 0.06 C rs2276881 A/G GG GG GG GG 0.06 G rs363070 A/G AA AA AA AA 0.06 A rs35892913 A/G GG GG GG GG 0.04 G rs12502045 T/C CC CC CC CC 0.04 C rs6446723 T/C TC CC TC TT 0.04 C rs7685686 A/G AG GG AG AA 0.04 G rs3733217 T/C CC CC CC CC 0.03 C rs6844859 T/C TC CC TC TT 0.03 C rs362331 T/C TC CC TC TT 0.03 C

E. Certain Indications

In certain embodiments, provided herein are methods of treating an animal or individual comprising administering one or more pharmaceutical compositions as described herein. In certain embodiments, the individual or animal has Huntington's disease.

In certain embodiments, compounds targeted to huntingtin as described herein may be administered to reduce the severity of physiological symptoms of Huntington's disease. In certain embodiments, compounds targeted to huntingtin as described herein may be administered to reduce the rate of degeneration in an individual or an animal having Huntington's disease. In certain embodiments, compounds targeted to huntingtin as described herein may be administered regeneration function in an individual or an animal having Huntington's disease. In certain embodiments, symptoms of Huntingtin's disease may be reversed by treatment with a compound as described herein.

In certain embodiments, compounds targeted to huntingtin as described herein may be administered to ameliorate one or more symptoms of Huntington's disease. In certain embodiments administration of compounds targeted to huntingtin as described herein may improve the symptoms of Huntington's disease as measured by any metric known to those having skill in the art. In certain embodiments, administration of compounds targeted to huntingtin as described herein may improve a rodent's rotaraod assay performance. In certain embodiments, administration of compounds targeted to huntingtin as described herein may improve a rodent's plus maze assay. In certain embodiments, administration of compounds targeted to huntingtin as described herein may improve a rodent's open field assay performance.

Accordingly, provided herein are methods for ameliorating a symptom associated with Huntington's disease in a subject in need thereof. In certain embodiments, provided is a method for reducing the rate of onset of a symptom associated with Huntington's disease. In certain embodiments, provided is a method for reducing the severity of a symptom associated with Huntington's disease. In certain embodiments, provided is a method for regenerating neurological function as shown by an improvement of a symptom associated with Huntington's disease. In such embodiments, the methods comprise administering to an individual or animal in need thereof a therapeutically effective amount of a compound targeted to a huntingtin nucleic acid.

Huntington's disease is characterized by numerous physical, neurological, psychiatric, and/or peripheral symptoms. Any symptom known to one of skill in the art to be associated with Huntington's disease can be ameliorated or otherwise modulated as set forth above in the methods described above. In certain embodiments, the symptom is a physical symptom selected from the group consisting of restlessness, lack of coordination, unintentionally initiated motions, unintentionally uncompleted motions, unsteady gait, chorea, rigidity, writhing motions, abnormal posturing, instability, abnormal facial expressions, difficulty chewing, difficulty swallowing, difficulty speaking, seizure, and sleep disturbances. In certain embodiments, the symptom is a cognitive symptom selected from the group consisting of impaired planning, impaired flexibility, impaired abstract thinking, impaired rule acquisition, impaired initiation of appropriate actions, impaired inhibition of inappropriate actions, impaired short-term memory, impaired long-term memory, paranoia, disorientation, confusion, hallucination and dementia. In certain embodiments, the symptom is a psychiatric symptom selected from the group consisting of anxiety, depression, blunted affect, egocentrisms, aggression, compulsive behavior, irritability and suicidal ideation. In certain embodiments, the symptom is a peripheral symptom selected from the group consisting of reduced brain mass, muscle atrophy, cardiac failure, impaired glucose tolerance, weight loss, osteoporosis, and testicular atrophy.

In certain embodiments, the symptom is restlessness. In certain embodiments, the symptom is lack of coordination. In certain embodiments, the symptom is unintentionally initiated motions. In certain embodiments, the symptom is unintentionally uncompleted motions. In certain embodiments, the symptom is unsteady gait. In certain embodiments, the symptom is chorea. In certain embodiments, the symptom is rigidity. In certain embodiments, the symptom is writhing motions. In certain embodiments, the symptom is abnormal posturing. In certain embodiments, the symptom is instability. In certain embodiments, the symptom is abnormal facial expressions. In certain embodiments, the symptom is difficulty chewing. In certain embodiments, the symptom is difficulty swallowing. In certain embodiments, the symptom is difficulty speaking. In certain embodiments, the symptom is seizures. In certain embodiments, the symptom is sleep disturbances.

In certain embodiments, the symptom is impaired planning. In certain embodiments, the symptom is impaired flexibility. In certain embodiments, the symptom is impaired abstract thinking. In certain embodiments, the symptom is impaired rule acquisition. In certain embodiments, the symptom is impaired initiation of appropriate actions. In certain embodiments, the symptom is impaired inhibition of inappropriate actions. In certain embodiments, the symptom is impaired short-term memory. In certain embodiments, the symptom is impaired long-term memory. In certain embodiments, the symptom is paranoia. In certain embodiments, the symptom is disorientation. In certain embodiments, the symptom is confusion. In certain embodiments, the symptom is hallucination. In certain embodiments, the symptom is dementia.

In certain embodiments, the symptom is anxiety. In certain embodiments, the symptom is depression. In certain embodiments, the symptom is blunted affect. In certain embodiments, the symptom is egocentrism. In certain embodiments, the symptom is aggression. In certain embodiments, the symptom is compulsive behavior. In certain embodiments, the symptom is irritability. In certain embodiments, the symptom is suicidal ideation.

In certain embodiments, the symptom is reduced brain mass. In certain embodiments, the symptom is muscle atrophy. In certain embodiments, the symptom is cardiac failure. In certain embodiments, the symptom is impaired glucose tolerance. In certain embodiments, the symptom is weight loss. In certain embodiments, the symptom is osteoporosis. In certain embodiments, the symptom is testicular atrophy.

In certain embodiments, symptoms of Huntington's disease may be quantifiable. For example, osteoporosis may be measured and quantified by, for example, bone density scans. For such symptoms, in certain embodiments, the symptom may be reduced by about 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95 or 99%, or a range defined by any two of these values.

In certain embodiments, provided are methods of treating an individual comprising administering one or more pharmaceutical compositions as described herein. In certain embodiments, the individual has Huntington's disease.

In certain embodiments, administration of an antisense compound targeted to a huntingtin nucleic acid results in reduction of huntingtin expression by at least about 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95 or 99%, or a range defined by any two of these values.

In certain embodiments, pharmaceutical compositions comprising an antisense compound targeted to huntingtin are used for the preparation of a medicament for treating a patient suffering or susceptible to Huntington's disease.

F. Certain Pharmaceutical Compositions

In certain embodiments, the present invention provides pharmaceutical compositions comprising one or more antisense compound. In certain embodiments, such pharmaceutical composition comprises a suitable pharmaceutically acceptable diluent or carrier. In certain embodiments, a pharmaceutical composition comprises a sterile saline solution and one or more antisense compound. In certain embodiments, such pharmaceutical composition consists of a sterile saline solution and one or more antisense compound. In certain embodiments, the sterile saline is pharmaceutical grade saline. In certain embodiments, a pharmaceutical composition comprises one or more antisense compound and sterile water. In certain embodiments, a pharmaceutical composition consists of one or more antisense compound and sterile water. In certain embodiments, the sterile saline is pharmaceutical grade water. In certain embodiments, a pharmaceutical composition comprises one or more antisense compound and phosphate-buffered saline (PBS). In certain embodiments, a pharmaceutical composition consists of one or more antisense compound and sterile phosphate-buffered saline (PBS). In certain embodiments, the sterile saline is pharmaceutical grade PBS.

In certain embodiments, antisense compounds may be admixed with pharmaceutically acceptable active and/or inert substances for the preparation of pharmaceutical compositions or formulations. Compositions and methods for the formulation of pharmaceutical compositions depend on a number of criteria, including, but not limited to, route of administration, extent of disease, or dose to be administered.

Pharmaceutical compositions comprising antisense compounds encompass any pharmaceutically acceptable salts, esters, or salts of such esters. In certain embodiments, pharmaceutical compositions comprising antisense compounds comprise one or more oligonucleotide which, upon administration to an animal, including a human, is capable of providing (directly or indirectly) the biologically active metabolite or residue thereof. Accordingly, for example, the disclosure is also drawn to pharmaceutically acceptable salts of antisense compounds, prodrugs, pharmaceutically acceptable salts of such prodrugs, and other bioequivalents. Suitable pharmaceutically acceptable salts include, but are not limited to, sodium and potassium salts.

A prodrug can include the incorporation of additional nucleosides at one or both ends of an oligomeric compound which are cleaved by endogenous nucleases within the body, to form the active antisense oligomeric compound.

Lipid moieties have been used in nucleic acid therapies in a variety of methods. In certain such methods, the nucleic acid is introduced into preformed liposomes or lipoplexes made of mixtures of cationic lipids and neutral lipids. In certain methods, DNA complexes with mono- or poly-cationic lipids are formed without the presence of a neutral lipid. In certain embodiments, a lipid moiety is selected to increase distribution of a pharmaceutical agent to a particular cell or tissue. In certain embodiments, a lipid moiety is selected to increase distribution of a pharmaceutical agent to fat tissue. In certain embodiments, a lipid moiety is selected to increase distribution of a pharmaceutical agent to muscle tissue.

In certain embodiments, pharmaceutical compositions provided herein comprise one or more modified oligonucleotides and one or more excipients. In certain such embodiments, excipients are selected from water, salt solutions, alcohol, polyethylene glycols, gelatin, lactose, amylase, magnesium stearate, talc, silicic acid, viscous paraffin, hydroxymethylcellulose and polyvinylpyrrolidone.

In certain embodiments, a pharmaceutical composition provided herein comprises a delivery system. Examples of delivery systems include, but are not limited to, liposomes and emulsions. Certain delivery systems are useful for preparing certain pharmaceutical compositions including those comprising hydrophobic compounds. In certain embodiments, certain organic solvents such as dimethylsulfoxide are used.

In certain embodiments, a pharmaceutical composition provided herein comprises one or more tissue-specific delivery molecules designed to deliver the one or more pharmaceutical agents of the present invention to specific tissues or cell types. For example, in certain embodiments, pharmaceutical compositions include liposomes coated with a tissue-specific antibody.

In certain embodiments, a pharmaceutical composition provided herein comprises a co-solvent system. Certain of such co-solvent systems comprise, for example, benzyl alcohol, a nonpolar surfactant, a water-miscible organic polymer, and an aqueous phase. In certain embodiments, such co-solvent systems are used for hydrophobic compounds. A non-limiting example of such a co-solvent system is the VPD co-solvent system, which is a solution of absolute ethanol comprising 3% w/v benzyl alcohol, 8% w/v of the nonpolar surfactant Polysorbate 80™ and 65% w/v polyethylene glycol 300. The proportions of such co-solvent systems may be varied considerably without significantly altering their solubility and toxicity characteristics. Furthermore, the identity of co-solvent components may be varied: for example, other surfactants may be used instead of Polysorbate 80™; the fraction size of polyethylene glycol may be varied; other biocompatible polymers may replace polyethylene glycol, e.g., polyvinyl pyrrolidone; and other sugars or polysaccharides may substitute for dextrose.

In certain embodiments, a pharmaceutical composition provided herein is prepared for oral administration. In certain embodiments, pharmaceutical compositions are prepared for buccal administration.

In certain embodiments, a pharmaceutical composition is prepared for administration by injection (e.g., intravenous, subcutaneous, intramuscular, etc.). In certain of such embodiments, a pharmaceutical composition comprises a carrier and is formulated in aqueous solution, such as water or physiologically compatible buffers such as Hanks's solution, Ringer's solution, or physiological saline buffer. In certain embodiments, other ingredients are included (e.g., ingredients that aid in solubility or serve as preservatives). In certain embodiments, injectable suspensions are prepared using appropriate liquid carriers, suspending agents and the like. Certain pharmaceutical compositions for injection are presented in unit dosage form, e.g., in ampoules or in multi-dose containers. Certain pharmaceutical compositions for injection are suspensions, solutions or emulsions in oily or aqueous vehicles, and may contain formulatory agents such as suspending, stabilizing and/or dispersing agents. Certain solvents suitable for use in pharmaceutical compositions for injection include, but are not limited to, lipophilic solvents and fatty oils, such as sesame oil, synthetic fatty acid esters, such as ethyl oleate or triglycerides, and liposomes. Aqueous injection suspensions may contain.

G. Administration

In certain embodiments, the compounds and compositions as described herein are administered parenterally.

In certain embodiments, parenteral administration is by infusion. Infusion can be chronic or continuous or short or intermittent. In certain embodiments, infused pharmaceutical agents are delivered with a pump. In certain embodiments, parenteral administration is by injection.

In certain embodiments, compounds and compositions are delivered to the CNS. In certain embodiments, compounds and compositions are delivered to the cerebrospinal fluid. In certain embodiments, compounds and compositions are administered to the brain parenchyma. In certain embodiments, compounds and compositions are delivered to an animal by intrathecal administration, or intracerebroventricular administration. Broad distribution of compounds and compositions, described herein, within the central nervous system may be achieved with intraparenchymal administration, intrathecal administration, or intracerebroventricular administration.

In certain embodiments, parenteral administration is by injection. The injection may be delivered with a syringe or a pump. In certain embodiments, the injection is a bolus injection. In certain embodiments, the injection is administered directly to a tissue, such as striatum, caudate, cortex, hippocampus and cerebellum.

Therefore, in certain embodiments, delivery of a compound or composition described herein can affect the pharmacokinetic profile of the compound or composition. In certain embodiments, injection of a compound or composition described herein, to a targeted tissue improves the pharmacokinetic profile of the compound or composition as compared to infusion of the compound or composition. In a certain embodiment, the injection of a compound or composition improves potency compared to broad diffusion, requiring less of the compound or composition to achieve similar pharmacology. In certain embodiments, similar pharmacology refers to the amount of time that a target mRNA and/or target protein is down-regulated (e.g. duration of action). In certain embodiments, methods of specifically localizing a pharmaceutical agent, such as by bolus injection, decreases median effective concentration (EC50) by a factor of about 50 (e.g. 50 fold less concentration in tissue is required to achieve the same or similar pharmacodynamic effect). In certain embodiments, methods of specifically localizing a pharmaceutical agent, such as by bolus injection, decreases median effective concentration (EC50) by a factor of 20, 25, 30, 35, 40, 45 or 50. In certain embodiments the pharmaceutical agent in an antisense compound as further described herein. In certain embodiments, the targeted tissue is brain tissue. In certain embodiments the targeted tissue is striatal tissue. In certain embodiments, decreasing EC50 is desirable because it reduces the dose required to achieve a pharmacological result in a patient in need thereof.

In certain embodiments, an antisense oligonucleotide is delivered by injection or infusion once every month, every two months, every 90 days, every 3 months, every 6 months, twice a year or once a year.

H. Certain Combination Therapies

In certain embodiments, one or more pharmaceutical compositions are co-administered with one or more other pharmaceutical agents. In certain embodiments, such one or more other pharmaceutical agents are designed to treat the same disease, disorder, or condition as the one or more pharmaceutical compositions described herein. In certain embodiments, such one or more other pharmaceutical agents are designed to treat a different disease, disorder, or condition as the one or more pharmaceutical compositions described herein. In certain embodiments, such one or more other pharmaceutical agents are designed to treat an undesired side effect of one or more pharmaceutical compositions as described herein. In certain embodiments, one or more pharmaceutical compositions are co-administered with another pharmaceutical agent to treat an undesired effect of that other pharmaceutical agent. In certain embodiments, one or more pharmaceutical compositions are co-administered with another pharmaceutical agent to produce a combinational effect. In certain embodiments, one or more pharmaceutical compositions are co-administered with another pharmaceutical agent to produce a synergistic effect.

In certain embodiments, one or more pharmaceutical compositions and one or more other pharmaceutical agents are administered at the same time. In certain embodiments, one or more pharmaceutical compositions and one or more other pharmaceutical agents are administered at different times. In certain embodiments, one or more pharmaceutical compositions and one or more other pharmaceutical agents are prepared together in a single formulation. In certain embodiments, one or more pharmaceutical compositions and one or more other pharmaceutical agents are prepared separately.

In certain embodiments, pharmaceutical agents that may be co-administered with a pharmaceutical composition of include antipsychotic agents, such as, e.g., haloperidol, chlorpromazine, clozapine, quetapine, and olanzapine; antidepressant agents, such as, e.g., fluoxetine, sertraline hydrochloride, venlafaxine and nortriptyline; tranquilizing agents such as, e.g., benzodiazepines, clonazepam, paroxetine, venlafaxin, and beta-blockers; mood-stabilizing agents such as, e.g., lithium, valproate, lamotrigine, and carbamazepine; paralytic agents such as, e.g., Botulinum toxin; and/or other experimental agents including, but not limited to, tetrabenazine (Xenazine), creatine, conezyme Q10, trehalose, docosahexanoic acids, ACR16, ethyl-EPA, atomoxetine, citalopram, dimebon, memantine, sodium phenylbutyrate, ramelteon, ursodiol, zyprexa, xenasine, tiapride, riluzole, amantadine, [123I]MNI-420, atomoxetine, tetrabenazine, digoxin, detromethorphan, warfarin, alprozam, ketoconazole, omeprazole, and minocycline.

NONLIMITING DISCLOSURE AND INCORPORATION BY REFERENCE

While certain compounds, compositions and methods described herein have been described with specificity in accordance with certain embodiments, the following examples serve only to illustrate the compounds described herein and are not intended to limit the same. Each of the references, GenBank accession numbers, and the like recited in the present application is incorporated herein by reference in its entirety.

Although the sequence listing accompanying this filing identifies each sequence as either “RNA” or “DNA” as required, in reality, those sequences may be modified with any combination of chemical modifications. One of skill in the art will readily appreciate that such designation as “RNA” or “DNA” to describe modified oligonucleotides is, in certain instances, arbitrary. For example, an oligonucleotide comprising a nucleoside comprising a 2′-OH sugar moiety and a thymine base could be described as a DNA having a modified sugar (2′-OH for the natural 2′-H of DNA) or as an RNA having a modified base (thymine (methylated uracil) for natural uracil of RNA).

Accordingly, nucleic acid sequences provided herein, including, but not limited to those in the sequence listing, are intended to encompass nucleic acids containing any combination of natural or modified RNA and/or DNA, including, but not limited to such nucleic acids having modified nucleobases. By way of further example and without limitation, an oligomeric compound having the nucleobase sequence “ATCGATCG” encompasses any oligomeric compounds having such nucleobase sequence, whether modified or unmodified, including, but not limited to, such compounds comprising RNA bases, such as those having sequence “AUCGAUCG” and those having some DNA bases and some RNA bases such as “AUCGATCG” and oligomeric compounds having other modified or naturally occurring bases, such as “AT^(me)CGAUCG,” wherein ^(me)C indicates a cytosine base comprising a methyl group at the 5-position.

EXAMPLES

The following examples illustrate certain embodiments of the present invention and are not limiting. Moreover, where specific embodiments are provided, the inventors have contemplated generic application of those specific embodiments. For example, disclosure of an oligonucleotide having a particular motif provides reasonable support for additional oligonucleotides having the same or similar motif. And, for example, where a particular high-affinity modification appears at a particular position, other high-affinity modifications at the same position are considered suitable, unless otherwise indicated.

Example 1 Single Nucleotide Polymorphisms (SNPs) in the Huntingtin (HTT) Gene Sequence

SNP positions (identified by Hayden et al, WO/2009/135322) associated with the HTT gene were mapped to the HTT genomic sequence, designated herein as SEQ ID NO: 1 (NT_006081.18 truncated from nucleotides 1566000 to 1768000). Table 15 provides SNP positions associated with the HTT gene. Table 15 provides a reference SNP ID number from the Entrez SNP database at the National Center for Biotechnology Information (NCBI, http://www.ncbi.nlm.nih.gov/sites/entrez?db=snp), incorporated herein by reference. Table 15 furnishes further details on each SNP. The ‘Reference SNP ID number’ or ‘RS number’ is the number designated to each SNP from the Entrez SNP database at NCBI, incorporated herein by reference. ‘SNP position’ refers to the nucleotide position of the SNP on SEQ ID NO: 1. ‘Polymorphism’ indicates the nucleotide variants at that SNP position. ‘Major allele’ indicates the nucleotide associated with the major allele, or the nucleotide present in a statistically significant proportion of individuals in the human population. ‘Minor allele’ indicates the nucleotide associated with the minor allele, or the nucleotide present in a relatively small proportion of individuals in the human population.

TABLE 15 Single Nuclear Polymorphisms (SNPs) and their positions on SEQ ID NO: 1 SNP Major Minor RS No. position Polymorphism allele allele rs2857936 1963 C/T C T rs12506200 3707 A/G G A rs762855 14449 A/G G A rs3856973 19826 G/A G A rs2285086 28912 G/A A G rs7659144 37974 C/G C G rs16843804 44043 C/T C T rs2024115 44221 G/A A G rs10015979 49095 A/G A G rs7691627 51063 A/G G A rs2798235 54485 G/A G A rs4690072 62160 G/T T G rs6446723 66466 C/T T C rs363081 73280 G/A G A rs363080 73564 T/C C T rs363075 77327 G/A G A rs363064 81063 T/C C T rs3025849 83420 A/G A G rs6855981 87929 A/G G A rs363102 88669 G/A A G rs11731237 91466 C/T C T rs4690073 99803 A/G G A rs363144 100948 T/G T G rs3025838 101099 C/T C T rs34315806 101687 A/G G A rs363099 101709 T/C C T rs363096 119674 T/C T C rs2298967 125400 C/T T C rs2298969 125897 A/G G A rs6844859 130139 C/T T C rs363092 135682 C/A C A rs7685686 146795 A/G A G rs363088 149983 A/T A T rs362331 155488 C/T T C rs916171 156468 G/C C G rs362322 161018 A/G A G rs362275 164255 T/C C T rs362273 167080 A/G A G rs2276881 171314 G/A G A rs3121419 171910 T/C C T rs362272 174633 G/A G A rs362271 175171 G/A G A rs3775061 178407 C/T C T rs362310 179429 A/G G A rs362307 181498 T/C C T rs362306 181753 G/A G A rs362303 181960 T/C C T rs362296 186660 C/A C A rs1006798 198026 A/G A G

Example 2 Modified Oligonucleotides Targeting Huntingtin (HTT) Single Nucleotide Polymorphisms (SNP)

A series of modified oligonucleotides were designed. These modified oligonucleotides were designed to target SNP positions associated with the HTT gene. In the tables, the 1′ subscript indicates an (S)-cEt modification; ‘e’ subscript indicates MOE modification; ‘g’ subscript indicates a 3′-fluoro-HNA modification; ‘f’ subscript indicates 2′-alpha-fluoro-2′-deoxyribose; ‘m’ before the cytosine residue indicates a 5-methylcytosine; ‘x’ before the thymine residue indicates a 2-thiothymine; number along with ‘d’ indicates a the number of deoxyribose nucleosides; the ‘o’ subscript after the sugar modification subscripts indicates a phosphate ester linkage; ‘mp’ subscript after the nucleoside indicates a methylphosphonate full linker; ‘s’ subscript after the nucleoside indicates a phosphorothioate internucleoside linkages. The underlined nucleoside indicates the position on the modified oligonucleotide opposite to the SNP position.

TABLE 16 Modified oligonucleotides targeting Huntingtin (HTT) SNP rs2024115 SEQ ID. Isis No. SEQUENCE SNP Motif NO. 589567 T_(es) mCes A_(ks) A_(ks) G_(ds) mC_(ds) T _(ds) A_(ds) G_(ds) T_(ds) A_(ds) A_(ds) rs2024115 eekk-d8-kkeee 37 mC_(ks) G_(ks) A_(es) T_(es) Ge 607448 mC_(es) A_(ks) A_(ks) G_(ds) mC_(ds) T _(ds) A_(ds) G_(ds) T_(ds) A_(ds) A_(ds) mC_(ks) rs2024115 ekk-d8-kkeee 102 G_(ks) A_(es) T_(es) G_(e) 607441 T_(es) mC_(es) A_(ks) A_(ks) G_(ds) mC_(ds) T _(ds) A_(ds) G_(ds) T_(ds) A_(ds) A_(ds) rs2024115 eekk-d8-kkee 103 mC_(ks) G_(ks) A_(es) T_(e) 607455 A_(es) A_(ks) G_(ds) mC_(ds) T _(ds) A_(ds) G_(ds) T_(ds) A_(ds) A_(ds) mC_(ks) G_(ks) A_(es) rs2024115 ek-d8-kkeee 104 T_(es)G_(e) 607462 mC_(es) A_(es) A_(ks) G_(ds) mC_(ds) T _(ds) A_(ds) G_(ds) T_(ds) A_(ds) A_(ds) mC_(ks) rs2024115 eek-d8-kkee 105 G_(ks) A_(es) T_(e) 607469 T_(es) mC_(es) A_(es) A_(ks) G_(ds) mC_(ds) T _(ds) A_(ds) G_(ds) T_(ds) A_(ds) A_(ds) mC_(ks) rs2024115 eeek-d8-kee 106 G_(es) A_(e)

TABLE 17 Modified oligonucleotides targeting Huntingtin (HTT) SNP rs6446723 SEQ ID. Isis No. SEQUENCE SNP Motif NO. 589450 T_(es) A_(es) A_(es) T_(ks) T_(ks) T_(ds) T_(ds) mC_(ds) T_(ds) A _(ds) G_(ds) A_(ds) mC_(ks) T_(ks) rs6446723 eeekk-d7-kkeee 32 T_(es) T_(es)A_(e) 589546 T_(es) A_(es) A_(ks) T_(ks) T_(ds) T_(ds) T_(ds) mC_(ds) T_(ds) A _(ds) G_(ds) A_(ds) mC_(ks) T_(ks) rs6446723 eekk-d8-kkeee 35 T_(es) T_(es) A_(e) 589547 A_(es) A_(es) T_(ks) T_(ks) T_(ds) T_(ds) mC_(ds) T_(ds) A _(ds) G_(ds) A_(ds) mC_(ds) T_(ks) T_(ks) rs6446723 eekk-d8-kkeee 36 T_(es) A_(es) T_(e) 589718 T_(es) A_(ks) A_(es) T_(ks) T_(ds) T_(ds) T_(ds) mC_(ds) T_(ds) A _(ds) G_(ds) A_(ds) mC_(ks) T_(es) rs6446723 ekek-d8-kekee 44 T_(ks) T_(es) A_(e) 617104 T_(es) A_(es) A_(eo) T_(ko) T_(ks) T_(ds) T_(ds) mC_(ds) T_(ds) A_(ds) G_(ds) A_(ds) mC_(ko) T_(ko) rs6446723 eeekk-d7-kkeee 84 T_(es) T_(es) A_(e) 617106 T_(es) A_(eo) A_(ko) T_(ks) T_(ds) T_(ds) mC_(ds) T_(ds) mC_(ds) T_(ds) A_(ds) G_(ds) A_(ds) rs6446723 eekk-d8-kkeee 85 mC_(ko) T_(ko) T_(es) T_(es) A_(e) 617108 T_(es) A_(ko) A_(eo) T_(ks) T_(ds) T_(ds) mC_(ds) T_(ds) mC_(ds) T_(ds) A_(ds) G_(ds) A_(ds) rs6446723 ekek-d8-kekee 86 mC_(ko) T_(eo) T_(ks) T_(es) A_(e) 617109 A_(es) A_(eo) T_(ko) T_(ks) T_(ds) T_(ds) mC_(ds) T_(ds) mC_(ds) T_(ds) A_(ds) G_(ds) A_(ds) T_(ko) rs6446723 eekk-d8-kkeee 87 T_(ko) T_(es) A_(es) T_(e) 607446 A_(es) A_(ks) T_(ks) T_(ds) T_(ds) T_(ds) mC_(ds) T_(ds) A_(ds) G_(ds) A_(ds) mC_(ks) T_(ks) T_(es) rs6446723 ekk-d8-kkeee 92 T_(es)A_(e) 607439 T_(es)A_(es) A_(ks) T_(ks) T_(ds) T_(ds) T_(ds) mC_(ds) T_(ds) A_(ds) G_(ds) A_(ds) mC_(ks) T_(ks) rs6446723 eekk-d8-kkee 93 T_(es) T_(e) 607453 A_(es) T_(ks) T_(ds) T_(ds) T_(ds) mC_(ds) T_(ds) A_(ds) G_(ds) A_(ds) mC_(ks) T_(ks) T_(es) T_(es) rs6446723 ek-d8-kkeee 94 A_(e) 607460 A_(es) A_(ks) T_(ks) T_(ds) T_(ds) T_(ds) mC_(ds) T_(ds) A_(ds) G_(ds) A_(ds) mC_(ks) T_(ks) T_(es) rs6446723 ekk-d8-kkee 95 T_(e) 607467 T_(es) A_(es) A_(ks) T_(ks) T_(ds) T_(ds) T_(ds) mC_(ds) T_(ds) A_(ds) G_(ds) A_(ds) mC_(ks) rs6446723 eekk-d8-kee 96 T_(es)T_(e) 607447 A_(es) T_(ks) T_(ks) T_(ds) T_(ds) mC_(ds) T_(ds) A_(ds) G_(ds) A_(ds) mC_(ds) T_(ks) T_(ks) T_(es) rs6446723 ekk-d8-kkeee 97 A_(es)T_(es) 607440 A_(es) A_(es) T_(ks) T_(ks) T_(ds) T_(ds) mC_(ds) T_(ds) A_(ds) G_(ds) A_(ds) mC_(ds) T_(ks) T_(ks) rs6446723 eekk-d8-kkee 98 T_(es) A_(e) 607454 T_(es) T_(ks) T_(ds) T_(ds) mC_(ds) T_(ds) A_(ds) G_(ds) A_(ds) mC_(ds) T_(ks) T_(ks) T_(es) A_(es) rs6446723 ek-d8-kkeee 99 T_(e) 607461 A_(es) T_(ks) T_(ks) T_(ds) T_(ds) mC_(ds) T_(ds) A_(ds) G_(ds) A_(ds) mC_(ds) T_(ks) T_(ks) T_(es) rs6446723 ekk-d8-kkee 100 A_(e) 607468 A_(es) A_(es) T_(es) T_(ks) T_(ds) T_(ds) mC_(ds) T_(ds) A_(ds) G_(ds) A_(ds) mC_(ds) T_(ks) T_(es) rs6446723 eeek-d8-kee 101 T_(e) 607474 A_(es) A_(es) T_(es) T_(ks) T_(ds) T_(ds) mC_(ds) T_(ds) A_(ds) G_(ds) A_(ds) mC_(ks) T_(ks) T_(es) rs6446723 eeek-d7-kkeee 127 T_(es) A_(e) 607475 T_(es) A_(es) A_(es) T_(ks) T_(ds) T_(ds) T_(ds) mC_(ds) T_(ds) A_(ds) G_(ds) A_(ks) mC_(ks) T_(es) rs6446723 eeek-d7-kkeee 128 T_(es) T_(e) 607476 A_(es) T_(es) T_(ks) T_(ds) T_(ds) mC_(ds) T_(ds) A_(ds) G_(ds) A_(ds) mC_(ks) T_(ks) T_(es) T_(es) rs6446723 eek-d7-kkeee 129 A_(e) 607477 A_(es) A_(es) T_(es) T_(ks) T_(ds) T_(ds) mC_(ds) T_(ds) A_(ds) G_(ds) A_(ds) mC_(ks) T_(ks) T_(es) rs6446723 eeek-d7-kkee 130 T_(e) 607478 T_(es) A_(es) A_(es) T_(es) T_(ks) T_(ds) T_(ds) mC_(ds) T_(ds) A_(ds) G_(ds) A_(ds) mC_(ks) T_(ks) rs6446723 eeeek-d7-kke 131 T_(e)

TABLE 18 Modified oligonucleotides targeting Huntingtin (HTT) SNP rs363080 SEQ ID. Isis No. SEQUENCE SNP Motif NO. 609234 A_(es) G_(ks) A_(ks) G_(ds) A_(ds) A_(ds) mC_(ds) A_(ds) A_(ds) G_(ds) A_(ds) A_(ks) G_(ks) rs363080 ekk-d8-kkee 156 G_(es) mC_(e) 609235 G_(es) A_(ks) G_(ks) A_(ds) A_(ds) mC_(ds) A_(ds) A_(ds) G_(ds) A_(ds) A_(ds) G_(ks) G_(ks) rs363080 ekk-d8-kkee 157 mC_(es) T_(e) 609236 A_(es) G_(ks) A_(ks) A_(ds) mC_(ds) A_(ds) A_(ds) G_(ds) A_(ds) A_(ds) G_(ds) G_(ks) rs363080 ekk-d8-kkee 158 mC_(ks) T_(es) mC_(e) 609237 G_(es) A_(ks) A_(ks) mC_(ds) A_(ds) A_(ds) G_(ds) A_(ds) A_(ds) G_(ds) G_(ds) mC_(ks) rs363080 ekk-d8-kkee 159 T_(ks) mC_(es) mC_(e) 609238 A_(es) G_(ks) A_(ks) G_(ds) A_(ds) A_(ds) mC_(ds) A_(ds) A_(ds) G_(ds) A_(ds) A_(ks) rs363080 ekk-d8-kkeee 160 G_(ks) G_(es) mC_(es) T_(e) 609239 G_(es) A_(ks) G_(ks) A_(ds) A_(ds) mC_(ds) A_(ds) A_(ds) G_(ds) A_(ds) A_(ds) G_(ks) G_(ks) rs363080 ekk-d8-kkeee 161 mC_(es) T_(es) mC_(e) 609240 A_(es) G_(ks) A_(ks) A_(ds) mC_(ds) A_(ds) A_(ds) G_(ds) A_(ds) A_(ds) G_(ds) G_(ks) rs363080 ekk-d8-kkeee 162 mC_(ks) T_(es) mC_(es) mC_(e) 609241 G_(es) A_(ks) A_(ks) mC_(ds) A_(ds) A_(ds) G_(ds) A_(ds) A_(ds) G_(ds) G_(ds) mC_(ks) rs363080 ekk-d8-kkeee 163 T_(ks) mC_(es) mC_(es) A_(e)

TABLE 19 Modified oligonucleotides targeting Huntingtin (HTT) SNP rs363064 SEQ ID. Isis No. SEQUENCE SNP Motif NO. 589532 G_(es) A_(es) A_(es) T_(ks) A_(ks) mC_(ds) G _(ds) G_(ds) G_(ds) T_(ds) A_(ds) A_(ds) mC_(ks) rs363064 eeekk-d7-kkeee 33 A_(ks) T_(es) T_(es) T_(e) 589645 G_(es) A_(es) A_(ks) T_(ks) A_(ds) mC_(ds) G _(ds) G_(ds) G_(ds) T_(ds) A_(ds) A_(ds) mC_(ks) rs363064 eekk-d8-kkeee 42 A_(ks) T_(es) T_(es) T_(e) 589646 A_(es) A_(es) T_(ks) A_(ks) mC_(ds) G _(ds) G_(ds) G_(ds) T_(ds) A_(ds) A_(ds) mC_(ds) A_(ks) rs363064 eekk-d8-kkeee 43 T_(ks) T_(es) T_(es) T_(e) 617107 A_(es) A_(eo) T_(ko) A_(ks) mC_(ds) G _(ds) G_(ds) G_(ds) T_(ds) A_(ds) A_(ds) mC_(ds) A_(ko) rs363064 eekk-d8-kkeee 88 T_(ko) T_(es) T_(es) T_(e) 617110 G_(es) A_(es) A_(eo) T_(ko) A_(ks) mC_(ds) G _(ds) G_(ds) G_(ds) T_(ds) A_(ds) A_(ds) mC_(ko) rs363064 eeekk-d7-kkeee 89 T_(ko) T_(es) T_(es) T_(e) 607449 A_(es) T_(ks) A_(ks) mC_(ds) G _(ds) G_(ds) G_(ds) T_(ds) A_(ds) A_(ds) mC_(ds) A_(ks) T_(ks) rs363064 ekk-d8-kkeee 107 T_(es) T_(es) T_(e) 607442 A_(es) A_(es) T_(ks) A_(ks) mC_(ds) G _(ds) G_(ds) G_(ds) T_(ds) A_(ds) A_(ds) mC_(ds) A_(ks) rs363064 eekk-d8-kkee 108 T_(ks) T_(es) T_(e) 607456 T_(es) A_(ks) mC_(ds) G _(ds) G_(ds) G_(ds) T_(ds) A_(ds) A_(ds) mC_(ds) A_(ks) T_(ks) T_(es) T_(es) rs363064 ek-d8-kkeee 109 T_(e) 607463 A_(es) T_(es) A_(ks) mC_(ds) G _(ds) G_(ds) G_(ds) T_(ds) A_(ds) A_(ds) mC_(ds) A_(ks) T_(ks) rs363064 eek-d8-kkee 110 T_(es) T_(e) 607470 A_(es) A_(es) T_(es) A_(ks) mC_(ds) G _(ds) G_(ds) G_(ds) T_(ds) A_(ds) A_(ds) mC_(ds) A_(ks) rs363064 eeek-d8-kee 111 T_(es) T_(e) 607450 A_(es) A_(ks) T_(ks) A_(ds) mC_(ds) G _(ds) G_(ds) G_(ds) T_(ds) A_(ds) A_(ds) mC_(ks) A_(ks) rs363064 ekk-d8-kkeee 112 T_(es) T_(es) T_(e) 607443 G_(es) A_(es) A_(ks) T_(ks) A_(ds) mC_(ds) G _(ds) G_(ds) G_(ds) T_(ds) A_(ds) A_(ds) mC_(ks) rs363064 eekk-d8-kkee 113 A_(ks) T_(es) T_(e) 607457 A_(es) T_(ks) A_(ds) mC_(ds) G _(ds) G_(ds) G_(ds) T_(ds) A_(ds) A_(ds) mC_(ks) A_(ks) T_(es) rs363064 ek-d8-kkeee 114 T_(es) T_(e) 607464 A_(es) A_(ks) T_(ks) A_(ds) mC_(ds) G _(ds) G_(ds) G_(ds) T_(ds) A_(ds) A_(ds) mC_(ks) A_(ks) rs363064 ekk-d8-kkee 115 T_(es) T_(e) 607471 G_(es) A_(es) A_(es) T_(ks) A_(ds) mC_(ds) G _(ds) G_(ds) G_(ds) T_(ds) A_(ds) A_(ds) mC_(ks) rs363064 eeek-d8-kee 116 A_(es) T_(e)

TABLE 20 Modified oligonucleotides targeting Huntingtin (HTT) SNP rs7685686 SEQ ID. Isis No. SEQUENCE SNP Motif NO. 460209 T_(es) A_(ks) A_(ks) A_(ds) T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) rs7685686 ekk-d9-kke 3 mC_(e) 476333 A_(es) T_(ks) A_(es) A_(ks) A_(ds) T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 ekek-d9-keke 4 mC_(es) mC_(ks) A_(e) 540083 A_(es) A_(ks) T_(ks) T_(ks) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ds) mC_(ds) mC_(ds) rs7685686 ekkk-d9-ke 7 A_(ks) G_(e) 540094 T_(es) T_(ks) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ds) mC_(ds) mC_(ds) A_(ks) G_(ks) rs7685686 ek-d9-kkke 8 A_(ks) A_(e) 540095 A_(es) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ds) mC_(ds) mC_(ks) A_(ks) rs7685686 ek-d9-kkke 9 G_(ks) A_(e) 540096 A_(es) A_(ks) T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ds) mC_(ks) mC_(ks) rs7685686 ek-d9-kkke 10 A_(ks) G_(e) 540108 A_(es) T_(es) A_(es) A_(ks) A_(ks) T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ks) A_(ks) rs7685686 eeekk-d7-kkeee 11 mC_(es) mC_(es) A_(e) 550913 A_(ks) A_(ks) T_(es) A_(ks) A_(ks) A_(ds) T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) rs7685686 kkekk-d9-kkekk 12 A_(ks) mC_(ks) mC_(es) T_(ks) T_(k) 551429 T_(es) A_(es) A_(es) A_(ks) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 eeekk-d7-kke 13 mC_(ks) mC_(e) 556845 T_(es) A_(ks) A_(ks) A_(ds) xT_(ds) T_(ds) G_(ds) T_(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 ekk-d9-kke 14 mC_(ks) mC_(e) 558257 T_(es) A_(ks) A_(ks) A_(ds) T_(ds) T_(dmp) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 ekk-d9-kke 15 mC_(ks) mC_(e) 566267 T_(es) A_(ks) A_(ks) A_(ds) T_(gs) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 ekkdk-d7-kke 16 mC_(ks) mC_(e) 568876 A_(ks) T_(ks) A_(ks) A_(ks) A_(ks) T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ks) A_(ks) rs7685686 kkkkk-d7-kkkkk 17 mC_(ks) mC_(ks) A_(k) 571036 A_(es) T_(ks) A_(es) A_(ks) A_(es) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 ekekek-d7-keke 18 mC_(es) mC_(ks) A_(e) 571037 A_(es) T_(es) A_(es) A_(es) A_(ks) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 eeeekk-d7-keke 19 mC_(es) mC_(ks) A_(e) 571039 A_(es) T_(ks) A_(es) A_(ks) A_(ds) xT_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 ekek-d9-keke 20 mC_(es) mC_(ks) A_(e) 571069 A_(es) T_(es) A_(es) A_(es) A_(ks) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 eeeekk-d7-kkee 21 mC_(ks) mC_(es) A_(e) 571171 A_(es) T_(ks) A_(es) A_(ks) A_(ds) T_(ds) T_(dmp) G_(ds) T_(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 ekek-d9-keke 22 mC_(es) mC_(ks) A_(e) 572771 T_(es) A_(es) A_(es) A_(ks) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 eeekk-d7-kkee 23 mC_(ks) mC_(es) A_(e) 572772 A_(es) T_(es) A_(es) A_(es) A_(ks) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 eeeekk-d7-kke 24 mC_(ks) mC_(e) 575007 T_(es) A_(ks) A_(ks) A_(ds) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 ekkdk-d7-kke 25 mC_(ks) mC_(e) 575008 T_(es) A_(ks) A_(ks) A_(ks) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 ekkkk-d7-kke 26 mC_(ks) mC_(e) 585246 T_(es) A_(es) A_(es) A_(ks) T_(ks) T_(ds) G_(ds) T_(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 eeekk-d7-kkeee 31 mC_(ks) mC_(es) A_(es) G_(e) 589537 A_(es) A_(es) A_(ks) T_(ks) T_(ds) G_(ds) T_(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ds) mC_(ks) rs7685686 eekk-d8-kkeee 34 mC_(ks) A_(es) G_(es) A_(e) 593199 T_(es) A_(es) A_(eo) A_(ko) T_(ks) T_(ds) G_(ds) T_(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ko) C_(ks) rs7685686 eeekk-d7-kke 47 C_(e) 593200 A_(es) T_(ks) T_(ds) G_(ds) T _(ds) mCA_(ds) T_(ds) mC_(ds) A_(ds) mC_(ds) mC_(ko) A_(ko) rs7685686 ek-d9-kkke 48 G_(ks) A_(e) 593201 A_(es) T_(ko) A_(es) A_(ko) A_(es) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ko) rs7685686 ekekek-d7-keke 49 mC_(es) mC_(ks) A_(e) 593202 A_(es) T_(ko) A_(ko) A_(ko) A_(ks) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ko) rs7685686 ekkkk-d7-kkke 50 mC_(ko) mC_(ks) A_(e) 593203 T_(ks) A_(ko) A_(ko) A_(ko) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ko) rs7685686 kkkkk-d7-kkkkk 51 mC_(ko) mC_(ko) A_(ks) G_(k) 593204 A_(ks) T_(ko) A_(ko) A_(ko) A_(ko) T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ko) A_(ko) rs7685686 kkkkk-d7-kkkkk 52 mC_(ko) mC_(ko) A_(k) 598229 A_(es) T_(es) A_(es) A_(es) A_(ks) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ks) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 eeeekk-d3-k-d3- 53 mC_(es) mC_(ks) A_(e) keke 598299 T_(es) A_(es) A_(es) A_(ks) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) mC_(es) rs7685686 eeekk-d7-keee 54 mC_(es) A_(e) 598300 T_(es) A_(es) A_(es) A_(ks) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(es) mC_(es) rs7685686 eeekk-d7-eeee 55 mC_(es) A_(e) 598301 T_(es) A_(es) A_(es) A_(es) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) rs7685686 eeeek-d7-kkee 56 mC_(es) A_(e) 598302 T_(es) A_(es) A_(es) A_(es) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) mC_(es) rs7685686 eeeek-d7-keee 57 mC_(es) A_(e) 598303 T_(es) A_(es) A_(es) A_(es) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(es) mC_(es) rs7685686 eeeek-d7-eeee 58 mC_(es) A_(e) 598304 T_(es) A_(es) A_(es) A_(ds) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) mC_(es) rs7685686 eeedk-d7-keee 59 mC_(es) A_(e) 598305 A_(es) T_(es) A_(es) A_(es) A_(ds) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 eeeedk-d7-kkee 60 mC_(ks) mC_(es) A_(e) 598306 A_(es) T_(es) A_(es) A_(es) A_(ds) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 eeeedk-d7-keee 61 mC_(es) mC_(es) A_(e) 598307 A_(es) T_(es) A_(es) A_(es) A_(ds) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(es) rs7685686 eeeedk-d7-eeee 62 mC_(es) mC_(es) A_(e) 598308 T_(es) A_(eo) A_(eo) A_(es) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 eeeek-d7-keeee 63 mC_(eo) mC_(eo) A_(es) G_(e) 598309 A_(es) A_(eo) A_(eo) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) mC_(es) rs7685686 eeek-d7-keeeee 64 mC_(eo) A_(eo) G_(es) A_(e) 598310 A_(es) A_(eo) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) mC_(es) mC_(es) rs7685686 eek-d7-keeeeee 65 A_(eo) G_(eo) A_(es) A_(e) 606560 A_(es) T_(es) A_(es) A_(ks) A_(ds) xT_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 eeek-d9-keke 66 mC_(es) mC_(ks) A_(e) 606561 A_(es) T_(ks) A_(es) A_(ks) A_(ds) xT_(ds) T_(ds) G_(ds) T_(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 ekek-d9-keee 67 mC_(es) mC_(es) A_(e) 606562 A_(es) T_(es) A_(es) A_(ks) A_(ds) xT_(ds) T_(ds) G_(ds) T_(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 eeek-d9-keee 68 mC_(es) mC_(es) A_(e) 606578 A_(es) T_(ks) A_(es) A_(ks) A_(ds) T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) A_(fs) T_(ds) mC_(ds) A_(ks) rs7685686 ekek-d6-k-dd- 69 mC_(es) mC_(ks) A_(e) keke 617115 A_(es) T_(es) A_(es) A_(es) A_(es) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 eeeeek-d7-kke 70 mC_(ks) mC_(e) 617116 A_(es) T_(es) A_(es) A_(es) A_(ks) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 eeeekk-d7-kee 71 mC_(es) mC_(e) 617117 A_(es) T_(es) A_(es) A_(es) A_(es) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 eeeeek-d7-kee 72 mC_(es) mC_(e) 617118 A_(es) T_(eo) A_(eo) A_(eo) A_(eo) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ks) rs7685686 eeeeek-d7-kee 73 mC_(es) mC_(e) 617119 A_(es) T_(eo) A_(eo) A_(eo) A_(eo) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(es) rs7685686 eeeeek-d7-eee 74 mC_(es) mC_(e) 617425 A_(es) T_(es) A_(es) A_(es) A_(es) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(es) rs7685686 eeeeek-d7-eee 75 mC_(es) mC_(e) 613581 A_(es) A_(eo) T_(eo) A_(eo) A_(es) A_(ds) T_(ks) T_(ds) G_(ds) T_(ds) mC_(ds) A_(ds) T_(ds) rs7685686 eeeeedk-d7- 76 mC_(ds) A_(eo) mC_(eo) mC_(es) A_(es) G_(e) eeeee 613582 A_(es) T_(es) A_(eo) A_(eo) A_(es) T_(ks) T_(ds) G_(ds) T_(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) rs7685686 eeeeek-d7-eeeeee 77 A_(eo) mC_(eo) mC_(eo) A_(es) G_(es) A_(e) 613583 T_(es) A_(eo) A_(eo) A_(es) T_(ks) T_(ds) G_(ds) T_(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(es) rs7685686 eeeek-d7-eeeeeee 78 mC_(eo) mC_(eo) A_(eo) G_(es) A_(es) A_(e) 613584 A_(es) A_(eo) A_(es) T_(ks) T_(ds) G_(ds) T_(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(es) mC_(eo) rs7685686 eeek-d7-eeeeeeee 79 mC_(eo) A_(eo) G_(eo) A_(es) A_(es) A_(e) 613585 A_(es) A_(eo) T_(ks) T_(ds) G_(ds) T_(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(es) mC_(es) rs7685686 eek-d7-eeeeeeeee 80 mC_(eo) A_(eo) G_(eo) A_(eo) A_(es) A_(es) A_(e) 613586 A_(es) T_(ks) T_(ds) G_(ds) T_(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(es) mC_(es) mC_(eo) rs7685686 ek-d7-eeeeeeeeee 81 A_(eo) G_(eo) A_(eo) A_(eo) A_(es) A_(es) A_(e) 613588 T_(es) A_(es) A_(eo) T_(eo) A_(eo) A_(eo) A_(es) T_(ks) T_(ds) G_(ds) T_(ds) mC_(ds) A_(ds) T_(ds) rs7685686 eeeeeeek-d7-eeee 82 mC_(ds) A_(eo) mC_(es) mC_(es) A_(e) 613589 T_(es) T_(es) A_(eo) A_(eo) T_(eo) A_(eo) A_(eo) A_(es) T_(ks) T_(ds) G_(ds) T_(ds) mC_(ds) A_(ds) rs7685686 eeeeeeeek-d7-eee 83 T_(ds) mC_(ds) A_(es) mC_(es) mC_(e) 617105 A_(es) A_(eo) A_(ko) T_(ks) T_(ds) G_(ds) T_(ds m)C_(ds) A_(ds) T_(ds m)C_(ds) A_(ds m)C_(ko) rs7685686 eekk-d8-kkeee 90 mC_(ko) A_(es) G_(es) A_(e) 617111 A_(es) T_(ko) A_(eo) A_(ks) A_(ds) xT_(ds) T_(ds) G_(ds) T_(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) A_(ko) rs7685686 ekek-d9-keke 91 mC_(es) mC_(ks) A_(e)

TABLE 21 Modified oligonucleotides targeting Huntingtin (HTT) SNP rs363088 Isis No. SEQUENCE SNP Motif SEQ ID. NO. 435871 T_(es) mC_(es) A_(es) mC_(es) A_(es) G_(ds) mC_(ds) T_(ds) A_(ds) rs363088 eeeee-d9-eeeee 2 T _(ds) mC_(ds) T_(ds) T_(ds) mC_(ds) T_(es) mC_(es) A_(es) T_(es) mC_(e) 525366 mC_(es) A_(ks) mC_(es) A_(ks) G_(ds) mC_(ds) T_(ds) A_(ds) T _(ds) rs363088 ekek-d9-keke 5 mC_(ds) T_(ds) T_(ds) mC_(ds) T_(ks) mC_(es) A_(ds) T_(e) 525368 A_(ks) mC_(es) A_(ks) G_(ks) mC_(ds) T_(ds) A_(ds) T _(ds) mC_(ds) rs363088 kekk-d8-keke 6 T_(ds) T_(ds) mC_(ds) T_(ks) mC_(es) A_(ks) T_(e) 575172 A_(es) mC_(ks) A_(ks) G_(ks) mC_(ds) T_(ds) A_(ds) T _(ds) mC_(ds) rs363088 ekkk-d8-kke 27 T_(ds) T_(ds) mC_(ds) T_(ks) mC_(ks) A_(e) 575175 A_(es) mC_(ks) A_(ks) G_(ds) mC_(ds) T_(ds) A_(ds) T _(ds) mC_(ds) rs363088 ekk-d8-kkke 28 T_(ds) T_(ds) mC_(ks) T_(ks) mC_(ks) A_(e) 582658 mC_(es) A_(ks) mC_(es) A_(ks) G_(ks) mC_(ds) T_(ds) A_(ds) T _(ds) rs363088 ekekk-d8-keke 29 mC_(ds) T_(ds) T_(ds) mC_(ds) T_(ks) mC_(es) A_(ks) T_(e) 582661 C_(es) A_(ks) mC_(es) A_(ks) G_(ds) mC_(ds) T_(ds) A_(ds) T _(ds) rs363088 ekek-d8-kkeke 30 mC_(ds) T_(ds) T_(ds) mC_(ks) T_(ks) mC_(es) A_(ks) T_(e) 589595 mC_(es) A_(es) mC_(ks) A_(ks) G_(ds) mC_(ds) T_(ds) A_(ds) T _(ds) rs363088 eekk-d8-kkeee 38 mC_(ds) T_(ds) T_(ds) mC_(ks) T_(ks) mC_(es) A_(es) T_(e) 589596 A_(es) mC_(es) A_(ks) G_(ks) mC_(ds) T_(ds) A_(ds) T _(ds) mC_(ds) rs363088 eekk-d8-kkeee 39 T_(ds) T_(ds) mC_(ds) T_(ks) mC_(ks) A_(es) T_(es) mC_(e) 591416 mC_(es) A_(es) mC_(es) A_(ks) G_(ks) mC_(ds) T_(ds) A_(ds) T _(ds) rs363088 eeekk-d8-kkee 46 mC_(ds) T_(ds) T_(ds) mC_(ds) T_(ks) mC_(ks) A_(es) T_(e)

TABLE 22 Modified oligonucleotides targeting Huntingtin (HTT) SNP rs362307 Isis No. SEQUENCE SNP Motif SEQ ID. NO. 609230 G_(es) G_(ks) G_(ks) mC_(ds) A_(ds) mC_(ds) A_(ds) G_(ds) A_(ds) rs362307 ekk-d8-kkee 148 mC_(ds) T_(ds) T_(ks) mC_(ks) mC_(es) A_(e) 609231 A_(es) G_(ks) G_(ks) G_(ds) mC_(ds) A_(ds) mC_(ds) A_(ds) G_(ds) rs362307 ekk-d8-kkee 149 A_(ds) mC_(ds) T_(ks) T_(ks) mC_(es) mC_(e) 609232 A_(es) A_(ks) G_(ks) G_(ds) G_(ds) mC_(ds) A_(ds) mC_(ds) A_(ds) rs362307 ekk-d8-kkee 150 G_(ds) A_(ds) mC_(ks) T_(ks) T_(es) mC_(e) 609233 mC_(es) A_(ks) A_(ks) G_(ds) G_(ds) G_(ds) mC_(ds) A_(ds) mC_(ds) rs362307 ekk-d8-kkee 151 A_(ds) G_(ds) A_(ks) mC_(ks) T_(es) T_(e) 609242 G_(es) G_(ks) G_(ks) mC_(ds) A_(ds) mC_(ds) A_(ds) G_(ds) A_(ds) rs362307 ekk-d8-kkeee 152 mC_(ds) T_(ds) T_(ks) mC_(ks) mC_(es) A_(es) A_(e) 609243 A_(es) G_(ks) G_(ks) G_(ds) mC_(ds) A_(ds) mC_(ds) A_(ds) G_(ds) rs362307 ekk-d8-kkeee 153 A_(ds) mC_(ds) T_(ks) T_(ks) mC_(es) mC_(es) A_(e) 609244 A_(es) A_(ks) G_(ks) G_(ds) G_(ds) mC_(ds) A_(ds) mC_(ds) A_(ds) rs362307 ekk-d8-kkeee 154 G_(ds) A_(ds) mC_(ks) T_(ks) T_(es) mC_(es) mC_(e) 609245 mC_(es) A_(ks) A_(ks) G_(ds) G_(ds) G_(ds) mC_(ds) A_(ds) mC_(ds) rs362307 ekk-d8-kkeee 155 A_(ds) G_(ds) A_(ks) mC_(ks) T_(es) T_(es) mC_(e)

Table 22: Modified Oligonucleotides Targeting Huntingtin (HTT) SNP rs7685686 (G)

As described above in Example 1, certain SNPs may have two or more allelic variants. For example, the two allelic variants for SNP rs7685686 are A and G. In certain embodiments, antisense oligonucleotides can be designed that target either allelic variant. In certain embodiments, a higher percentage of the population may have a particular allelic variant. Modified oligonucleotides were designed to target the G allelic variant of rs7685686. These modified oligonucleotides are described further in Table 22 below.

Isis No. SEQUENCE SNP Motif SEQ ID. NO. 609274 T_(es) A_(ks) A_(ks) A_(ds) T_(ds) T_(ds) G_(ds) mC _(ds) mC_(ds) A_(ds) rs7685686 ekk-d7-kkeee 132 T_(ks) mC_(ks) A_(es) mC_(es) mC_(e) (G) 609226 T_(es) A_(ks) A_(ks) A_(ds) T_(ds) T_(ds) G_(ds) mC _(ds) mC_(ds) A_(ds) rs7685686 ekk-d8-kkee 136 T_(ds) mC_(ks) A_(ks) mC_(es) mC_(es) (G) 609266 T_(es) A_(ks) A_(ks) A_(ds) T_(ds) T_(ds) G_(ds) mC _(ds) mC_(ds) A_(ds) rs7685686 ekk-d7-kkeeeee 140 T_(ks) mC_(ks) A_(es) mC_(es) mC_(es) A_(es) G_(e) (G) 609270 T_(es) A_(ks) A_(ks) A_(ds) T_(ds) T_(ds) G_(ds) mC _(ds) mC_(ds) A_(ds) rs7685686 ekk-d8-kkeeee 144 T_(ds) mC_(ks) A_(ks) mC_(es) mC_(es) A_(es) G_(e) (G) 611714 T_(es)A_(es)A_(es)A_(ks)T_(ks)T_(ds)G_(ds)mC _(ds)mC_(ds)A_(ds) rs7685686 eeekk-d7-kke 164 T_(ds)mC_(ds)A_(ks)mC_(ks)mC_(e) (G) 611715 A_(es) T_(ks) A_(es) A_(ks)A_(ds) xT_(ds) T_(ds) G_(ds) mC _(ds) mC_(ds) rs7685686 ekek-d9-keke 165 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(es) mC_(ks) A_(e) (G) 611716 A_(es) T_(ks) A_(es) A_(ks) A_(ds) T_(ds) T_(dx) G_(ds) mC _(ds) mC_(ds) A_(ds) rs7685686 ekek-d9-keke 166 T_(ds) mC_(ds) A_(ks)mC_(es) mC_(ks)A_(e) (G) 611717 A_(es) T_(es)A_(es)A_(es)A_(ks)T_(ks)T_(ds) G_(ds) mC _(ds) mC_(ds)A_(ds) rs7685686 eeeekk-d7-kke 167 T_(ds) mC_(ds)A_(ks)mC_(ks) mC_(e) (G) 611718 T_(e)A_(ks)A_(ks)A_(ds) T_(ks)T_(ds) G_(ds) mC _(ds) mC_(ds) A_(ds) T_(ds) rs7685686 ekk-d-k-d7-kke 168 mC_(ds)A_(ks)mC_(ks)mC_(e) (G) 611719 T_(e) A_(ks)A_(ks)A_(ks)T_(ks)T_(ds)G_(ds)mC _(ds)mC_(ds)A_(ds)T_(ds) rs7685686 ekkkk-d7-kke 169 mC_(ds) A_(ks)mC_(ks)mC_(e) (G) 611720 A_(e)T_(ks)T_(ds)G_(ds)mC _(ds)mC_(ds)A_(ds)T_(ds)mC_(ds)A_(ds) mC_(ds) rs7685686 ek-d9-kkke 170 mC_(ko)A_(ko)G_(ks)A_(e) (G) 611721 T_(es) A_(es)A_(es)A_(es)T_(ks)T_(ds)G_(ds)mC _(ds)mC_(ds)A_(ds)T_(ds) rs7685686 eeeek-d7-keee 171 mC_(ds) A_(ks) mC_(es) mC_(es) A_(es) (G) 611722 A_(es) T_(es) A_(es) A_(es) A_(ds) T_(ks) T_(ds) G_(ds) mC _(ds) mC_(ds) A_(ds) rs7685686 eeee-d-k-d7-keee 172 T_(ds) mC_(ds) A_(ks) mC_(es)mC_(es) A_(e) (G) 611723 T_(es) A_(eo)A_(eo)A_(es)T_(ks)T_(ds) G_(ds)mC _(ds)mC_(ds)A_(ds)T_(ds) rs7685686 eeeek-d7-keeee 173 mC_(ds)A_(ks)mC_(eo)mC_(eo)A_(es)G_(e) (G) 609275 A_(es) A_(ks) A_(ks) T_(ds) T_(ds) G_(ds) mC _(ds) mC_(ds) A_(ds) T_(ds) rs7685686 ekk-d7-kkeee 133 mC_(ks) A_(ks) mC_(es) mC_(es) A_(e) (G) 609227 A_(es) A_(ks) A_(ks) T_(ds) T_(ds) G_(ds) mC _(ds) mC_(ds) A_(ds) T_(ds) rs7685686 ekk-d8-kkee 137 mC_(ds) A_(ks) mC_(ks) mC_(es) A_(e) (G) 609267 A_(es) A_(ks) A_(ks) T_(ds) T_(ds) G_(ds) mC _(ds) mC_(ds) A_(ds) T_(ds) rs7685686 ekk-d7-kkeeeee 141 mC_(ks) A_(ks) mC_(es) mC_(es) A_(es) G_(es) A_(e) (G) 609271 A_(es) A_(ks) A_(ks) T_(ds) T_(ds) G_(ds) mC _(ds) mC_(ds) A_(ds) T_(ds) rs7685686 ekk-d8-kkeeee 145 mC_(ds) A_(ks) mC_(ks) mC_(es) A_(es) G_(es) A_(e) (G) 609276 A_(es) A_(ks) T_(ks) T_(ds) G_(ds) mC _(ds) mC_(ds) A_(ds) T_(ds) rs7685686 ekk-d7-kkeee 134 mC_(ds) A_(ks) mC_(ks) mC_(es) A_(es) G_(e) (G) 609228 A_(es) A_(ks) T_(ks) T_(ds) G_(ds) mC _(ds) mC_(ds) A_(ds) T_(ds) rs7685686 ekk-d8-kkee 138 mC_(ds) A_(ds) mC_(ks) mC_(ks) A_(es) G_(e) (G) 609268 A_(es) A_(ks) T_(ks) T_(ds) G_(ds) mC _(ds) mC_(ds) A_(ds) T_(ds) rs7685686 ekk-d7-kkeeeee 142 mC_(ds) A_(ks) mC_(ks) mC_(es) A_(es) G_(es) A_(es) A_(e) (G) 609272 A_(es) A_(ks) T_(ks) T_(ds) G_(ds) mC _(ds) mC_(ds) A_(ds) T_(ds) rs7685686 ekk-d8-kkeeee 146 mC_(ds) A_(ds) mC_(ks) mC_(ks) A_(es) G_(es) A_(es) A_(e) (G) 609277 A_(es) T_(ks) T_(ks) G_(ds) mC _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) rs7685686 ekk-d7-kkeee 135 A_(ds) mC_(ks) mC_(ks) A_(es) G_(es) A_(e) (G) 609229 A_(es) T_(ks) T_(ks) G_(ds) mC _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) rs7685686 ekk-d8-kkee 139 A_(ds) mC_(ds) mC_(ks) A_(ks) G_(es) A_(e) (G) 609269 A_(es) T_(ks) T_(ks) G_(ds) mC _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) rs7685686 ekk-d7-kkeeeee 143 A_(ds) mC_(ks) mC_(ks) A_(es) G_(es) A_(es) A_(es) A_(e) (G) 609273 A_(es) T_(ks) T_(ks) G_(ds) mC _(ds) mC_(ds) A_(ds) T_(ds) mC_(ds) rs7685686 ekk-d8-kkeeee 147 A_(ds) mC_(ds) mC_(ks) A_(ks) G_(es) A_(es) A_(es) A_(e) (G)

TABLE 23 Modified oligonucleotides targeting Huntingtin (HTT) SNP rs362273 Isis No. SEQUENCE SNP Motif SEQ ID. NO. 589601 T_(es) T_(es) G_(ks) A_(ks) T_(ds) mC_(ds) T_(ds) G_(ds) T _(ds) A_(ds) rs362273 eekk-d8-kkeee 40 G_(ds) mC_(ds) A_(ks) G_(ks) mC_(es) A_(es) G_(e) 589602 T_(es) G_(es) A_(ks) T_(ks) mC_(ds) T_(ds) G_(ds) T _(ds) A_(ds) G_(ds) rs362273 eekk-d8-kkeee 41 mC_(ds) A_(ds) G_(ks) mC_(ks) A_(es) G_(es) mC_(e) 589737 T_(es) T_(ks) G_(es) A_(ks) T_(ds) mC_(ds) T_(ds) G_(ds) T _(ds) A_(ds) rs362273 ekek-d8-kekee 45 G_(ds) mC_(ds) A_(ks) G_(es) mC_(ks) A_(es) G_(e) 607451 G_(es) A_(ks) T_(ks) mC_(ds) T_(ds) G_(ds) T_(ds) A_(ds) G_(ds) rs362273 ekk-d8-kkeee 117 mC_(ds) A_(ds) G_(ks) mC_(ks) A_(es) G_(es) mC_(e) 607452 T_(es) G_(ks) A_(ks) T_(ds) mC_(ds) T_(ds) G_(ds) T_(ds) A_(ds) G_(ds) rs362273 ekk-d8-kkeee 122 mC_(ds) A_(ks) G_(ks) mC_(es) A_(es) G_(e)

TABLE 24 Modified oligonucleotides targeting Huntingtin (HTT) SNP rs362274 Isis No. SEQUENCE SNP Motif SEQ ID. NO. 607444 T_(es) G_(es) A_(ks) T_(ks) mC_(ds) T_(ds) G_(ds) T_(ds) A_(ds) G_(ds) rs362274 eekk-d8-kkee 118 mC_(ds) A_(ds) G_(ks) mC_(ks) A_(es) G_(e) 607445 T_(es) T_(es) G_(ks) A_(ks) T_(ds) mC_(ds) T_(ds) G_(ds) T_(ds) A_(ds) rs362274 eekk-d8-kkee 123 G_(ds) mC_(ds) A_(ks) G_(ks) mC_(es) A_(e)

TABLE 25 Modified oligonucleotides targeting Huntingtin (HTT) SNP rs362275 Isis No. SEQUENCE SNP Motif SEQ ID. NO. 607458 A_(es) T_(ks) mC_(ds) T_(ds) G_(ds) T_(ds) A_(ds) G_(ds) mC_(ds) rs362275 ek-d8-kkeee 119 A_(ds) G_(ks) mC_(ks) A_(es) G_(es) mC_(e) 607459 G_(es) A_(ks) T_(ds) mC_(ds) T_(ds) G_(ds) T_(ds) A_(ds) G_(ds) rs362275 ek-d8-kkeee 124 mC_(ds) A_(ks) G_(ks) mC_(es) A_(es) G_(e)

TABLE 25 Modified oligonucleotides targeting Huntingtin (HTT) SNP rs362276 Isis No. SEQUENCE SNP Motif SEQ ID. NO. 607465 G_(es) A_(es) T_(ks) mC_(ds) T_(ds) G_(ds) T_(ds) A_(ds) G_(ds) rs362276 eek-d8-kkee 120 mC_(ds) A_(ds) G_(ks) mC_(ks) A_(es) G_(e) 607466 T_(es) G_(es) A_(ks) T_(ds) mC_(ds) T_(ds) G_(ds) T_(ds) A_(ds) G_(ds) rs362276 eek-d8-kkee 125 mC_(ds) A_(ks) G_(ks) mC_(es) A_(e)

TABLE 26 Modified oligonucleotides targeting Huntingtin (HTT) SNP rs362277 Isis No. SEQUENCE SNP Motif SEQ ID. NO. 607472 T_(es) G_(es) A_(es) T_(ks) mC_(ds) T_(ds) G_(ds) T_(ds) A_(ds) G_(ds) rs362276 eeek-d8-kee 121 mC_(ds) A_(ds) G_(ks) mC_(es) A_(e) 607473 T_(es) T_(es) G_(es) A_(ks) T_(ds) mC_(ds) T_(ds) G_(ds) T_(ds) A_(ds) rs362276 eeek-d8-kee 126 G_(ds) mC_(ds) A_(ks) G_(es) mC_(e)

Example 3: Modified Oligonucleotides Targeting Huntingtin (HTT) Single Nucleotide Polymorphisms (SNP)

A series of modified oligonucleotides targeting Huntingtin (HTT) were designed. These modified oligonucleotides were designed to target SNP positions associated with the HTT gene. The table below provides the sequence and motif for each modified oligonucleotide. The motifs indicate certain 2′-modifications to the nucleobases in the nucleobase sequences. In the table below, 1′ indicates an (S)-cEt modification; ‘e’ indicates a MOE modification; a number along with ‘d’ indicates the number of deoxyribose nucleosides. For example, a compound having an ekk-d9-kke motif would have the following structure: N_(e)N_(k)N_(k)N_(d)N_(d)N_(d)N_(d)N_(d)N_(d)N_(d)N_(d)N_(d)N_(k)N_(k)N_(e), wherein each N represents a nucleobase and wherein each subscript represents a nucleobase modification according to the examples described above. All internucleoside linkages are phosphorothioate unless otherwise indicated.

SEQ ID Isis No. SNP SEQUENCE (5′ to 3′) MOTIF (5′ to 3′) NO. 460207 rs362332 ACACAGTAGATGAGG ekk-d9-kke 174 460218 rs362332 GCACACAGTAGATGAGGGA eeeee-d3-k-d5-eeeee 175 460026 rs2298969 AAGGGATGCTGACTTGGGC eeee-d9-eeeee 176 460208 rs4690072 CAGTGCTACCCAACC ekk-d9-kke 177 525364 rs4690072 ACAGTGCTACCCAACCT ekek-d9-keke 178 435331 rs2024115 TTCAAGCTAGTAACGATGC eeeee-d9-eeeee 179 525365 rs2024115 CTTCAAGCTAGTAACGA ekek-d9-keke 180 525368 rs363088 ACAGCTATCTTCTCA ekk-d9-kke 181 460065 rs7685686 ATAAATTGTCATCACCAG eeee-d9-eeeee 182 435879 rs7685686 AATAAATTGTCATCACCAG eeeee-d9-eeeee 183 460085 rs7685686 ATAAATTGTCATCACCA eeeee-d7-eeeee 184 435870 rs362331 GCACACAGTAGATGAGGGA eeeee-d9-eeeee 185 460071 rs362331 GCACACAGTAGATGAGGGA eeeee-d10-eeee 186 460212 rs362331 GCACACAGTAGATGAGGGA eeeee-d4-k-d4-eeeee 187 460231 rs362331 ACAGTAGATGAGGGAGCAG eeeee-k-d8-eeeee 188 474892 rs362331 CACACAGTAGATGAGGG kekk-d9-kkek 189 435890 rs2298969 AAGGGATGCTGACTTGGGC eeeee-d9-eeeee 190 460210 rs2298969 GGGATGCTGACTTGG ekk-d9-kke 191 474871 rs7685686 ATAAATTGTCATCACCA ekkk-d9-kkke 192 474891 rs7685686 ATAAATTGTCATCACCA kekk-d9-kkek 193 474919 rs7685686 AATAAATTGTCATCACCAG kekek-d9-kekek 194 474923 rs7685686 AATAAATTGTCATCACCAG kdkdk-d9-kdkdk 195 476337 rs7685686 AATAAATTGTCATCACCAG ekeke-d9-ekeke 196 460012 rs4690072 ACAGTGCTACCCAACCT eee-d9-eeeee 197 525367 rs2024115 TTCAAGCTAGTAACG ekk-d9-kke 198 435869 rs362306 GAGCAGCTGCAACCTGGCA eeeee-d9-eeeee 199 460069 rs362306 GAGCAGCTGCAACCTGGCA eeeee-d10-eeee 200 460206 rs362306 GCAGCTGCAACCTGG ekk-d9-kke 201 463571 rs362273 TTGATCTGTAGCAGCAGCT eeeee-d9-eeeee 202 476444 rs6844859 CCTTCCTCACTGAGGATGA eeeee-d9-eeeee 203 435330 rs3856973 TAACACTCGATTAACCCTG eeeee-d9-eeeee 204 435868 rs362275 AAGAAGCCTGATAAAATCT eeeee-d9-eeeee 205 491416 rs7685686 TGCTTCAGAGCTGAGCAGAA eeeee-d10-eeeee 206 553748 ACCACAACGGCGATT ekk-d9-kke 207 553751 TACCTAAGAGCACAT ekk-d9-kke 208 553752 rs2285086 TAGTTCATCCCAGTG ekk-d9-kke 209 553754 rs2798235 GAGGAGGTATACTGT ekk-d9-kke 210 553762 rs362303 TGGTGCCGGGTGTCT ekk-d9-kke 211 553764 rs362310 AAACGGCGCAGCGGG ekk-d9-kke 212 553765 CGCCTATACCATACA ekk-d9-kke 213 553767 GATAATATCCTATCA ekk-d9-kke 214 553768 rs363080 AGAGAACAAGAAGGC ekk-d9-kke 215 553769 rs363092 AACCACTGTGGGATG ekk-d9-kke 216 553772 rs363102 CTAAAACTAACTTGA ekk-d9-kke 217 553773 CGTTGAAGTACTGTC ekk-d9-kke 218 553775 rs3856973 TAACACTCGATTAAC ekk-d9-kke 219 553776 rs4690073 CCTAAATCAATCTAC ekk-d9-kke 220 553777 rs6446723 ATTTTCTAGACTTTA ekk-d9-kke 221 553778 rs6844859 CTTCCTCACTGAGGA ekk-d9-kke 222 553779 rs7659144 GAAATGGGTTTTTCC ekk-d9-kke 223 553780 rs7691627 TAAGAAACACAATCA ekk-d9-kke 224 553781 rs916171 GAACAAACAGAAGAA ekk-d9-kke 225 553782 rs362303 TGGTGCCAGGTGTCT ekk-d9-kke 226 553784 rs362310 AAACGGCACAGCGGG ekk-d9-kke 227 435295 rs2024115 ACTTCAAGCTAGTAACGAT eeeee-d9-eeeee 228 553742 ACACCACAACGGCGATTTG eeeee-d9-eeeee 229 553743 CTTACCTAAGAGCACATTT eeeee-d9-eeeee 230 435864 rs2285086 GCTAGTTCATCCCAGTGAG eeeee-d9-eeeee 231 435910 rs2798235 CAGAGGAGGTATACTGTAT eeeee-d9-eeeee 232 435311 rs362303 AATGGTGCCGGGTGTCTAG eeeee-d9-eeeee 233 435309 rs362310 AGAAACGGCGCAGCGGGAA eeeee-d9-eeeee 234 553744 TCCGCCTATACCATACAAT eeeee-d9-eeeee 235 553745 ATGATAATATCCTATCAAA eeeee-d9-eeeee 236 435911 rs363080 AGAGAGAACAAGAAGGCTC eeeee-d9-eeeee 237 435872 rs363092 CAAACCACTGTGGGATGAA eeeee-d9-eeeee 238 435300 rs363102 ATCTAAAACTAACTTGAGA eeeee-d9-eeeee 239 553746 AGCGTTGAAGTACTGTCCC eeeee-d9-eeeee 240 435294 rs3856973 GTTAACACTCGATTAACCC eeeee-d9-eeeee 241 435301 rs4690073 TCCCTAAATCAATCTACAA eeeee-d9-eeeee 242 435875 rs6446723 TAATTTTCTAGACTTTATG eeeee-d9-eeeee 243 435876 rs6844859 ACCTTCCTCACTGAGGATG eeeee-d9-eeeee 244 435878 rs7659144 TGGAAATGGGTTTTTCCAC eeeee-d9-eeeee 245 435880 rs7691627 AATAAGAAACACAATCAAA eeeee-d9-eeeee 246 435906 rs916171 CAGAACAAACAGAAGAATT eeeee-d9-eeeee 247 435329 rs362303 AATGGTGCCAGGTGTCTAG eeeee-d9-eeeee 248 435327 rs362310 AGAAACGGCACAGCGGGAA eeeee-d9-eeeee 249 553766 rs363064 AGAATACGGGTAACA ekk-d9-kke 250 553771 rs363099 CTGAGCGGAGAAACC ekk-d9-kke 251 553770 rs363096 TTCCCTAAAAACAAA ekk-d9-kke 252 553753 rs2298967 CTTTTCTATTGTCTG ekk-d9-kke 253 553758 rs362272 TAGAGGACGCCGTGC ekk-d9-kke 254 553783 rs363096 TTCCCTAGAAACAAA ekk-d9-kke 255 553763 rs362307 CAAGGGCACAGACTT ekk-d9-kke 256 553750 rs16843804 TAACCGTGGCATGGG ekk-d9-kke 257 553755 rs3121419 GACTATAGCACCCAG ekk-d9-kke 258 553757 rs362271 GTGTGTACAGAACCT ekk-d9-kke 259 553760 rs362275 GAAGCCTGATAAAAT ekk-d9-kke 260 553774 rs3775061 TTCAGAATGCCTCAT ekk-d9-kke 261 553761 rs362296 GGACAGGGTGTGCTC ekk-d9-kke 262 553747 rs10015979 AGCTAGGCTAAAGAG ekk-d9-kke 263 553749 rs11731237 TGGGCAGAAAGGACT ekk-d9-kke 264 553759 rs362273 TGATCTGTAGCAGCA ekk-d9-kke 265 553756 rs34315806 CTTTTCCGTGCTGTT ekk-d9-kke 266 435298 rs363064 GGAGAATACGGGTAACATT eeeee-d9-eeeee 267 435303 rs363099 GGCTGAGCGGAGAAACCCT eeeee-d9-eeeee 268 435304 rs363096 GATTCCCTAAAAACAAAAA eeeee-d9-eeeee 269 435305 rs2298967 TGCTTTTCTATTGTCTGTC eeeee-d9-eeeee 270 435308 rs362272 CATAGAGGACGCCGTGCAG eeeee-d9-eeeee 271 435322 rs363096 GATTCCCTAGAAACAAAAA eeeee-d9-eeeee 272 435328 rs362307 CACAAGGGCACAGACTTCC eeeee-d9-eeeee 273 435863 rs16843804 TTTAACCGTGGCATGGGCA eeeee-d9-eeeee 274 435866 rs3121419 GAGACTATAGCACCCAGAT eeeee-d9-eeeee 275 435867 rs362271 ACGTGTGTACAGAACCTGC eeeee-d9-eeeee 276 435873 rs3775061 TGTTCAGAATGCCTCATCT eeeee-d9-eeeee 277 435882 rs362296 GGGGACAGGGTGTGCTCTC eeeee-d9-eeeee 278 435887 rs10015979 GCAGCTAGGCTAAAGAGTC eeeee-d9-eeeee 279 435909 rs11731237 GGTGGGCAGAAAGGACTGA eeeee-d9-eeeee 280 463566 rs362273 GTTGATCTGTAGCAGCAGC eeeee-d9-eeeee 281 463567 rs34315806 AACTTTTCCGTGCTGTTCT eeeee-d9-eeeee 282 589448 rs3856973 AACACTCGATTAACCCT eeekk-d7-kkeee 283 589447 rs3856973 TAACACTCGATTAACCC eeekk-d7-kkeee 284 589163 rs3856973 TTAACACTCGATTAACC eeekk-d7-kkeee 285 589446 rs3856973 GTTAACACTCGATTAAC eeekk-d7-kkeee 286 589445 rs3856973 AGTTAACACTCGATTAA eeekk-d7-kkeee 287 589669 rs3856973 AACACTCGATTAACCCT eekek-d7-kekee 288 589668 rs3856973 TAACACTCGATTAACCC eekek-d7-kekee 289 589667 rs3856973 TTAACACTCGATTAACC eekek-d7-kekee 290 589666 rs3856973 GTTAACACTCGATTAAC eekek-d7-kekee 291 589665 rs3856973 AGTTAACACTCGATTAA eekek-d7-kekee 292 589544 rs3856973 ACACTCGATTAACCCTG eekk-d8-kkeee 293 589543 rs3856973 AACACTCGATTAACCCT eekk-d8-kkeee 294 589542 rs3856973 TAACACTCGATTAACCC eekk-d8-kkeee 295 589541 rs3856973 TTAACACTCGATTAACC eekk-d8-kkeee 296 589540 rs3856973 GTTAACACTCGATTAAC eekk-d8-kkeee 297 589539 rs3856973 AGTTAACACTCGATTAA eekk-d8-kkeee 298 589716 rs3856973 ACACTCGATTAACCCTG ekek-d8-kekee 299 589715 rs3856973 AACACTCGATTAACCCT ekek-d8-kekee 300 589714 rs3856973 TAACACTCGATTAACCC ekek-d8-kekee 301 589713 rs3856973 TTAACACTCGATTAACC ekek-d8-kekee 302 589712 rs3856973 GTTAACACTCGATTAAC ekek-d8-kekee 303 589711 rs3856973 AGTTAACACTCGATTAA ekek-d8-kekee 304 589444 rs7685686 AAATTGTCATCACCAGA eeekk-d7-kkeee 305 589443 rs7685686 AATAAATTGTCATCACC eeekk-d7-kkeee 306 589442 rs7685686 TAATAAATTGTCATCAC eeekk-d7-kkeee 307 589664 rs7685686 AAATTGTCATCACCAGA eekek-d7-kekee 308 589663 rs7685686 TAAATTGTCATCACCAG eekek-d7-kekee 309 589662 rs7685686 ATAAATTGTCATCACCA eekek-d7-kekee 310 589661 rs7685686 AATAAATTGTCATCACC eekek-d7-kekee 311 589660 rs7685686 TAATAAATTGTCATCAC eekek-d7-kekee 312 589538 rs7685686 AATTGTCATCACCAGAA eekk-d8-kkeee 313 589536 rs7685686 TAAATTGTCATCACCAG eekk-d8-kkeee 314 589535 rs7685686 ATAAATTGTCATCACCA eekk-d8-kkeee 315 589534 rs7685686 AATAAATTGTCATCACC eekk-d8-kkeee 316 589533 rs7685686 TAATAAATTGTCATCAC eekk-d8-kkeee 317 589710 rs7685686 AATTGTCATCACCAGAA ekek-d8-kekee 318 589709 rs7685686 AAATTGTCATCACCAGA ekek-d8-kekee 319 589708 rs7685686 TAAATTGTCATCACCAG ekek-d8-kekee 320 589707 rs7685686 ATAAATTGTCATCACCA ekek-d8-kekee 321 589706 rs7685686 AATAAATTGTCATCACC ekek-d8-kekee 322 589705 rs7685686 TAATAAATTGTCATCAC ekek-d8-kekee 323 589468 rs2024115 TCAAGCTAGTAACGATG eeekk-d7-kkeee 324 589467 rs2024115 TTCAAGCTAGTAACGAT eeekk-d7-kkeee 325 589466 rs2024115 CTTCAAGCTAGTAACGA eeekk-d7-kkeee 326 589465 rs2024115 ACTTCAAGCTAGTAACG eeekk-d7-kkeee 327 589464 rs2024115 AACTTCAAGCTAGTAAC eeekk-d7-kkeee 328 589568 rs2024115 CAAGCTAGTAACGATGC eekk-d8-kkeee 329 589566 rs2024115 TTCAAGCTAGTAACGAT eekk-d8-kkeee 330 589565 rs2024115 CTTCAAGCTAGTAACGA eekk-d8-kkeee 331 589564 rs2024115 ACTTCAAGCTAGTAACG eekk-d8-kkeee 332 589563 rs2024115 AACTTCAAGCTAGTAAC eekk-d8-kkeee 333 589453 rs6446723 TTTTCTAGACTTTATGA eeekk-d7-kkeee 334 589452 rs6446723 ATTTTCTAGACTTTATG eeekk-d7-kkeee 335 589451 rs6446723 AATTTTCTAGACTTTAT eeekk-d7-kkeee 336 589449 rs6446723 TTAATTTTCTAGACTTT eeekk-d7-kkeee 337 589674 rs6446723 TTTTCTAGACTTTATGA eekek-d7-kekee 338 589673 rs6446723 ATTTTCTAGACTTTATG eekek-d7-kekee 339 589672 rs6446723 AATTTTCTAGACTTTAT eekek-d7-kekee 340 589671 rs6446723 TAATTTTCTAGACTTTA eekek-d7-kekee 341 589670 rs6446723 TTAATTTTCTAGACTTT eekek-d7-kekee 342 589550 rs6446723 TTTCTAGACTTTATGAT eekk-d8-kkeee 343 589549 rs6446723 TTTTCTAGACTTTATGA eekk-d8-kkeee 344 589548 rs6446723 ATTTTCTAGACTTTATG eekk-d8-kkeee 345 589545 rs6446723 TTAATTTTCTAGACTTT eekk-d8-kkeee 346 589722 rs6446723 TTTCTAGACTTTATGAT ekek-d8-kekee 347 589721 rs6446723 TTTTCTAGACTTTATGA ekek-d8-kekee 348 589720 rs6446723 ATTTTCTAGACTTTATG ekek-d8-kekee 349 589719 rs6446723 AATTTTCTAGACTTTAT ekek-d8-kekee 350 589717 rs6446723 TTAATTTTCTAGACTTT ekek-d8-kekee 351 589463 rs6844859 TTCCTCACTGAGGATGA eeekk-d7-kkeee 352 589462 rs6844859 CTTCCTCACTGAGGATG eeekk-d7-kkeee 353 589461 rs6844859 CCTTCCTCACTGAGGAT eeekk-d7-kkeee 354 589460 rs6844859 ACCTTCCTCACTGAGGA eeekk-d7-kkeee 355 589459 rs6844859 CACCTTCCTCACTGAGG eeekk-d7-kkeee 356 590761 rs6844859 TTCCTCACTGAGGATGA eekek-d7-kekee 357 590760 rs6844859 CTTCCTCACTGAGGATG eekek-d7-kekee 358 590759 rs6844859 CCTTCCTCACTGAGGAT eekek-d7-kekee 359 590758 rs6844859 ACCTTCCTCACTGAGGA eekek-d7-kekee 360 590757 rs6844859 CACCTTCCTCACTGAGG eekek-d7-kekee 361 589562 rs6844859 TCCTCACTGAGGATGAA eekk-d8-kkeee 362 589561 rs6844859 TTCCTCACTGAGGATGA eekk-d8-kkeee 363 589560 rs6844859 CTTCCTCACTGAGGATG eekk-d8-kkeee 364 589559 rs6844859 CCTTCCTCACTGAGGAT eekk-d8-kkeee 365 589558 rs6844859 ACCTTCCTCACTGAGGA eekk-d8-kkeee 366 589557 rs6844859 CACCTTCCTCACTGAGG eekk-d8-kkeee 367 590767 rs6844859 TCCTCACTGAGGATGAA ekek-d8-kekee 368 590766 rs6844859 TTCCTCACTGAGGATGA ekek-d8-kekee 369 590765 rs6844859 CTTCCTCACTGAGGATG ekek-d8-kekee 370 590764 rs6844859 CCTTCCTCACTGAGGAT ekek-d8-kekee 371 590763 rs6844859 ACCTTCCTCACTGAGGA ekek-d8-kekee 372 590762 rs6844859 CACCTTCCTCACTGAGG ekek-d8-kekee 373 589483 rs363092 ACCACTTTGGGATGAAT eeekk-d7-kkeee 374 589482 rs363092 AACCACTTTGGGATGAA eeekk-d7-kkeee 375 589481 rs363092 AAACCACTTTGGGATGA eeekk-d7-kkeee 376 589480 rs363092 CAAACCACTTTGGGATG eeekk-d7-kkeee 377 589479 rs363092 GCAAACCACTTTGGGAT eeekk-d7-kkeee 378 589586 rs363092 CCACTTTGGGATGAATA eekk-d8-kkeee 379 589585 rs363092 ACCACTTTGGGATGAAT eekk-d8-kkeee 380 589584 rs363092 AACCACTTTGGGATGAA eekk-d8-kkeee 381 589583 rs363092 AAACCACTTTGGGATGA eekk-d8-kkeee 382 589582 rs363092 CAAACCACTTTGGGATG eekk-d8-kkeee 383 589581 rs363092 GCAAACCACTTTGGGAT eekk-d8-kkeee 384 589458 rs2285086 AGTTCATCCCAGTGAGA eeekk-d7-kkeee 385 589457 rs2285086 TAGTTCATCCCAGTGAG eeekk-d7-kkeee 386 589456 rs2285086 CTAGTTCATCCCAGTGA eeekk-d7-kkeee 387 589455 rs2285086 GCTAGTTCATCCCAGTG eeekk-d7-kkeee 388 589454 rs2285086 TGCTAGTTCATCCCAGT eeekk-d7-kkeee 389 589679 rs2285086 AGTTCATCCCAGTGAGA eekek-d7-kekee 390 589678 rs2285086 TAGTTCATCCCAGTGAG eekek-d7-kekee 391 589677 rs2285086 CTAGTTCATCCCAGTGA eekek-d7-kekee 392 589676 rs2285086 GCTAGTTCATCCCAGTG eekek-d7-kekee 393 589675 rs2285086 TGCTAGTTCATCCCAGT eekek-d7-kekee 394 589556 rs2285086 GTTCATCCCAGTGAGAA eekk-d8-kkeee 395 589555 rs2285086 AGTTCATCCCAGTGAGA eekk-d8-kkeee 396 589554 rs2285086 TAGTTCATCCCAGTGAG eekk-d8-kkeee 397 589553 rs2285086 CTAGTTCATCCCAGTGA eekk-d8-kkeee 398 589552 rs2285086 GCTAGTTCATCCCAGTG eekk-d8-kkeee 399 589551 rs2285086 TGCTAGTTCATCCCAGT eekk-d8-kkeee 400 589728 rs2285086 GTTCATCCCAGTGAGAA ekek-d8-kekee 401 589727 rs2285086 AGTTCATCCCAGTGAGA ekek-d8-kekee 402 589726 rs2285086 TAGTTCATCCCAGTGAG ekek-d8-kekee 403 589725 rs2285086 CTAGTTCATCCCAGTGA ekek-d8-kekee 404 589724 rs2285086 GCTAGTTCATCCCAGTG ekek-d8-kekee 405 589723 rs2285086 TGCTAGTTCATCCCAGT ekek-d8-kekee 406 589473 rs2798235 AGGAGGCATACTGTATT eeekk-d7-kkeee 407 589472 rs2798235 GAGGAGGCATACTGTAT eeekk-d7-kkeee 408 589471 rs2798235 AGAGGAGGCATACTGTA eeekk-d7-kkeee 409 589470 rs2798235 CAGAGGAGGCATACTGT eeekk-d7-kkeee 410 589469 rs2798235 ACAGAGGAGGCATACTG eeekk-d7-kkeee 411 589574 rs2798235 GGAGGCATACTGTATTT eekk-d8-kkeee 412 589573 rs2798235 AGGAGGCATACTGTATT eekk-d8-kkeee 413 589572 rs2798235 GAGGAGGCATACTGTAT eekk-d8-kkeee 414 589571 rs2798235 AGAGGAGGCATACTGTA eekk-d8-kkeee 415 589570 rs2798235 CAGAGGAGGCATACTGT eekk-d8-kkeee 416 589569 rs2798235 ACAGAGGAGGCATACTG eekk-d8-kkeee 417 589478 rs363080 GAGAACGAGAAGGCTCC eeekk-d7-kkeee 418 589477 rs363080 AGAGAACGAGAAGGCTC eeekk-d7-kkeee 419 589476 rs363080 GAGAGAACGAGAAGGCT eeekk-d7-kkeee 420 589475 rs363080 AGAGAGAACGAGAAGGC eeekk-d7-kkeee 421 589474 rs363080 AAGAGAGAACGAGAAGG eeekk-d7-kkeee 422 589580 rs363080 AGAACGAGAAGGCTCCA eekk-d8-kkeee 423 589579 rs363080 GAGAACGAGAAGGCTCC eekk-d8-kkeee 424 589578 rs363080 AGAGAACGAGAAGGCTC eekk-d8-kkeee 425 589577 rs363080 GAGAGAACGAGAAGGCT eekk-d8-kkeee 426 589576 rs363080 AGAGAGAACGAGAAGGC eekk-d8-kkeee 427 589575 rs363080 AAGAGAGAACGAGAAGG eekk-d8-kkeee 428 589497 rs362273 GATCTGTAGCAGCAGCT eeekk-d7-kkeee 429 589496 rs362273 TGATCTGTAGCAGCAGC eeekk-d7-kkeee 430 589495 rs362273 TTGATCTGTAGCAGCAG eeekk-d7-kkeee 431 589494 rs362273 GTTGATCTGTAGCAGCA eeekk-d7-kkeee 432 589493 rs362273 GGTTGATCTGTAGCAGC eeekk-d7-kkeee 433 589689 rs362273 GATCTGTAGCAGCAGCT eekek-d7-kekee 434 589688 rs362273 TGATCTGTAGCAGCAGC eekek-d7-kekee 435 589687 rs362273 TTGATCTGTAGCAGCAG eekek-d7-kekee 436 589686 rs362273 GTTGATCTGTAGCAGCA eekek-d7-kekee 437 589685 rs362273 GGTTGATCTGTAGCAGC eekek-d7-kekee 438 589604 rs362273 ATCTGTAGCAGCAGCTT eekk-d8-kkeee 439 589603 rs362273 GATCTGTAGCAGCAGCT eekk-d8-kkeee 440 589600 rs362273 GTTGATCTGTAGCAGCA eekk-d8-kkeee 441 589599 rs362273 GGTTGATCTGTAGCAGC eekk-d8-kkeee 442 589740 rs362273 ATCTGTAGCAGCAGCTT ekek-d8-kekee 443 589739 rs362273 GATCTGTAGCAGCAGCT ekek-d8-kekee 444 589738 rs362273 TGATCTGTAGCAGCAGC ekek-d8-kekee 445 589736 rs362273 GTTGATCTGTAGCAGCA ekek-d8-kekee 446 589735 rs362273 GGTTGATCTGTAGCAGC ekek-d8-kekee 447 589492 rs363088 CAGCTATCTTCTCATCA eeekk-d7-kkeee 448 589491 rs363088 ACAGCTATCTTCTCATC eeekk-d7-kkeee 449 575481 rs363088 CACAGCTATCTTCTCAT eeekk-d7-kkeee 450 589490 rs363088 TCACAGCTATCTTCTCA eeekk-d7-kkeee 451 589489 rs363088 TTCACAGCTATCTTCTC eeekk-d7-kkeee 452 589684 rs363088 CAGCTATCTTCTCATCA eekek-d7-kekee 453 589683 rs363088 ACAGCTATCTTCTCATC eekek-d7-kekee 454 589682 rs363088 CACAGCTATCTTCTCAT eekek-d7-kekee 455 589681 rs363088 TCACAGCTATCTTCTCA eekek-d7-kekee 456 589680 rs363088 TTCACAGCTATCTTCTC eekek-d7-kekee 457 589598 rs363088 AGCTATCTTCTCATCAA eekk-d8-kkeee 458 589597 rs363088 CAGCTATCTTCTCATCA eekk-d8-kkeee 459 589594 rs363088 TCACAGCTATCTTCTCA eekk-d8-kkeee 460 589593 rs363088 TTCACAGCTATCTTCTC eekk-d8-kkeee 461 589734 rs363088 AGCTATCTTCTCATCAA ekek-d8-kekee 462 589733 rs363088 CAGCTATCTTCTCATCA ekek-d8-kekee 463 589732 rs363088 ACAGCTATCTTCTCATC ekek-d8-kekee 464 589731 rs363088 CACAGCTATCTTCTCAT ekek-d8-kekee 465 589730 rs363088 TCACAGCTATCTTCTCA ekek-d8-kekee 466 589729 rs363088 TTCACAGCTATCTTCTC ekek-d8-kekee 467 589502 rs362271 TGTGTACAGAACCTGCC eeekk-d7-kkeee 468 589501 rs362271 GTGTGTACAGAACCTGC eeekk-d7-kkeee 469 589500 rs362271 CGTGTGTACAGAACCTG eeekk-d7-kkeee 470 589499 rs362271 ACGTGTGTACAGAACCT eeekk-d7-kkeee 471 589498 rs362271 CACGTGTGTACAGAACC eeekk-d7-kkeee 472 589694 rs362271 TGTGTACAGAACCTGCC eekek-d7-kekee 473 589693 rs362271 GTGTGTACAGAACCTGC eekek-d7-kekee 474 589692 rs362271 CGTGTGTACAGAACCTG eekek-d7-kekee 475 589691 rs362271 ACGTGTGTACAGAACCT eekek-d7-kekee 476 589690 rs362271 CACGTGTGTACAGAACC eekek-d7-kekee 477 589610 rs362271 GTGTACAGAACCTGCCG eekk-d8-kkeee 478 589609 rs362271 TGTGTACAGAACCTGCC eekk-d8-kkeee 479 589608 rs362271 GTGTGTACAGAACCTGC eekk-d8-kkeee 480 589607 rs362271 CGTGTGTACAGAACCTG eekk-d8-kkeee 481 589606 rs362271 ACGTGTGTACAGAACCT eekk-d8-kkeee 482 589605 rs362271 CACGTGTGTACAGAACC eekk-d8-kkeee 483 589746 rs362271 GTGTACAGAACCTGCCG ekek-d8-kekee 484 589745 rs362271 TGTGTACAGAACCTGCC ekek-d8-kekee 485 589744 rs362271 GTGTGTACAGAACCTGC ekek-d8-kekee 486 589743 rs362271 CGTGTGTACAGAACCTG ekek-d8-kekee 487 589742 rs362271 ACGTGTGTACAGAACCT ekek-d8-kekee 488 589741 rs362271 CACGTGTGTACAGAACC ekek-d8-kekee 489 589517 rs363099 TGAGCGGAGAAACCCTC eeekk-d7-kkeee 490 589516 rs363099 CTGAGCGGAGAAACCCT eeekk-d7-kkeee 491 589515 rs363099 GCTGAGCGGAGAAACCC eeekk-d7-kkeee 492 589514 rs363099 GGCTGAGCGGAGAAACC eeekk-d7-kkeee 493 589513 rs363099 AGGCTGAGCGGAGAAAC eeekk-d7-kkeee 494 589628 rs363099 GAGCGGAGAAACCCTCC eekk-d8-kkeee 495 589627 rs363099 TGAGCGGAGAAACCCTC eekk-d8-kkeee 496 589626 rs363099 CTGAGCGGAGAAACCCT eekk-d8-kkeee 497 589625 rs363099 GCTGAGCGGAGAAACCC eekk-d8-kkeee 498 589624 rs363099 GGCTGAGCGGAGAAACC eekk-d8-kkeee 499 589623 rs363099 AGGCTGAGCGGAGAAAC eekk-d8-kkeee 500 589531 rs363064 AGAATACGGGTAACATT eeekk-d7-kkeee 501 589530 rs363064 GAGAATACGGGTAACAT eeekk-d7-kkeee 502 589529 rs363064 GGAGAATACGGGTAACA eeekk-d7-kkeee 503 589528 rs363064 TGGAGAATACGGGTAAC eeekk-d7-kkeee 504 589644 rs363064 AGAATACGGGTAACATT eekk-d8-kkeee 505 589643 rs363064 GAGAATACGGGTAACAT eekk-d8-kkeee 506 589642 rs363064 GGAGAATACGGGTAACA eekk-d8-kkeee 507 589522 rs16843804 AACCGTGGCATGGGCAG eeekk-d7-kkeee 508 589521 rs16843804 TAACCGTGGCATGGGCA eeekk-d7-kkeee 509 589520 rs16843804 TTAACCGTGGCATGGGC eeekk-d7-kkeee 510 589519 rs16843804 TTTAACCGTGGCATGGG eeekk-d7-kkeee 511 589518 rs16843804 CTTTAACCGTGGCATGG eeekk-d7-kkeee 512 589634 rs16843804 ACCGTGGCATGGGCAGT eekk-d8-kkeee 513 589633 rs16843804 AACCGTGGCATGGGCAG eekk-d8-kkeee 514 589632 rs16843804 TAACCGTGGCATGGGCA eekk-d8-kkeee 515 589631 rs16843804 TTAACCGTGGCATGGGC eekk-d8-kkeee 516 589630 rs16843804 TTTAACCGTGGCATGGG eekk-d8-kkeee 517 589629 rs16843804 CTTTAACCGTGGCATGG eekk-d8-kkeee 518 589512 rs3121419 ACTATAGCACCCAGATT eeekk-d7-kkeee 519 589511 rs3121419 GACTATAGCACCCAGAT eeekk-d7-kkeee 520 589510 rs3121419 AGACTATAGCACCCAGA eeekk-d7-kkeee 521 589509 rs3121419 GAGACTATAGCACCCAG eeekk-d7-kkeee 522 589508 rs3121419 AGAGACTATAGCACCCA eeekk-d7-kkeee 523 589704 rs3121419 ACTATAGCACCCAGATT eekek-d7-kekee 524 589703 rs3121419 GACTATAGCACCCAGAT eekek-d7-kekee 525 589702 rs3121419 AGACTATAGCACCCAGA eekek-d7-kekee 526 589701 rs3121419 GAGACTATAGCACCCAG eekek-d7-kekee 527 589700 rs3121419 AGAGACTATAGCACCCA eekek-d7-kekee 528 589622 rs3121419 CTATAGCACCCAGATTT eekk-d8-kkeee 529 589621 rs3121419 ACTATAGCACCCAGATT eekk-d8-kkeee 530 589620 rs3121419 GACTATAGCACCCAGAT eekk-d8-kkeee 531 589619 rs3121419 AGACTATAGCACCCAGA eekk-d8-kkeee 532 589618 rs3121419 GAGACTATAGCACCCAG eekk-d8-kkeee 533 589617 rs3121419 AGAGACTATAGCACCCA eekk-d8-kkeee 534 589758 rs3121419 CTATAGCACCCAGATTT ekek-d8-kekee 535 589757 rs3121419 ACTATAGCACCCAGATT ekek-d8-kekee 536 589756 rs3121419 GACTATAGCACCCAGAT ekek-d8-kekee 537 589755 rs3121419 AGACTATAGCACCCAGA ekek-d8-kekee 538 589754 rs3121419 GAGACTATAGCACCCAG ekek-d8-kekee 539 589753 rs3121419 AGAGACTATAGCACCCA ekek-d8-kekee 540 589527 rs2298967 TTTTCTATTGTCTGTCC eeekk-d7-kkeee 541 589526 rs2298967 CTTTTCTATTGTCTGTC eeekk-d7-kkeee 542 589525 rs2298967 GCTTTTCTATTGTCTGT eeekk-d7-kkeee 543 589524 rs2298967 TGCTTTTCTATTGTCTG eeekk-d7-kkeee 544 589523 rs2298967 TTGCTTTTCTATTGTCT eeekk-d7-kkeee 545 589640 rs2298967 TTTCTATTGTCTGTCCC eekk-d8-kkeee 546 589639 rs2298967 TTTTCTATTGTCTGTCC eekk-d8-kkeee 547 589638 rs2298967 CTTTTCTATTGTCTGTC eekk-d8-kkeee 548 589637 rs2298967 GCTTTTCTATTGTCTGT eekk-d8-kkeee 549 589636 rs2298967 TGCTTTTCTATTGTCTG eekk-d8-kkeee 550 589635 rs2298967 TTGCTTTTCTATTGTCT eekk-d8-kkeee 551 589507 rs34315806 TTTTCCGTGCTGTTCTG eeekk-d7-kkeee 552 589506 rs34315806 CTTTTCCGTGCTGTTCT eeekk-d7-kkeee 553 589505 rs34315806 ACTTTTCCGTGCTGTTC eeekk-d7-kkeee 554 589504 rs34315806 AACTTTTCCGTGCTGTT eeekk-d7-kkeee 555 589503 rs34315806 AAACTTTTCCGTGCTGT eeekk-d7-kkeee 556 589699 rs34315806 TTTTCCGTGCTGTTCTG eekek-d7-kekee 557 589698 rs34315806 CTTTTCCGTGCTGTTCT eekek-d7-kekee 558 589697 rs34315806 ACTTTTCCGTGCTGTTC eekek-d7-kekee 559 589696 rs34315806 AACTTTTCCGTGCTGTT eekek-d7-kekee 560 589695 rs34315806 AAACTTTTCCGTGCTGT eekek-d7-kekee 561 589616 rs34315806 TTTCCGTGCTGTTCTGA eekk-d8-kkeee 562 589615 rs34315806 TTTTCCGTGCTGTTCTG eekk-d8-kkeee 563 589614 rs34315806 CTTTTCCGTGCTGTTCT eekk-d8-kkeee 564 589613 rs34315806 ACTTTTCCGTGCTGTTC eekk-d8-kkeee 565 589612 rs34315806 AACTTTTCCGTGCTGTT eekk-d8-kkeee 566 589611 rs34315806 AAACTTTTCCGTGCTGT eekk-d8-kkeee 567 589752 rs34315806 TTTCCGTGCTGTTCTGA ekek-d8-kekee 568 589751 rs34315806 TTTTCCGTGCTGTTCTG ekek-d8-kekee 569 589750 rs34315806 CTTTTCCGTGCTGTTCT ekek-d8-kekee 570 589749 rs34315806 ACTTTTCCGTGCTGTTC ekek-d8-kekee 571 589748 rs34315806 AACTTTTCCGTGCTGTT ekek-d8-kekee 572 589747 rs34315806 AAACTTTTCCGTGCTGT ekek-d8-kekee 573

Example 4: 300 μg ICV Bolus 8 Week Study with Mice

Oligos were screened in human patient fibroblasts (either GM4022 or GM2173B) at 4 μM with electroporation (2 mm multiwell, 115V, 6 mS, 1 pulse, 3.5e5 cells per well). Target message was measured with an allele specific ABI primer probe set 24-hours post electroporation. Results were normalized to Ribogreen. The half maximal inhibitory concentration (IC₅₀) of each oligonucleotide is presented in the Table below and was calculated by plotting the concentrations of oligonucleotides used versus the percent inhibition of HTT mRNA expression achieved at each concentration, and noting the concentration of oligonucleotide at which 50% inhibition of HTT mRNA expression was achieved compared to the control. The IC₅₀ at which each oligonucleotide inhibits the mutant HTT mRNA expression is denoted as ‘mut IC₅₀’. The IC₅₀ at which each oligonucleotide inhibits the wild-type HTT mRNA expression is denoted as ‘wt IC₅₀’. “ND” means data not available.

Mice were separated into groups of 4 mice. Each mouse in each group of mice was administered a single 300 μg ICV dose of each of the oligonucleotides in the table below. At 3 hours post injection, each mouse was evaluated according to 7 different criteria. The 7 criteria are (1) the mouse was bright, alert, and responsive; (2) the mouse was standing or hunched without stimuli; (3) the mouse shows any movement without stimuli (4) the mouse demonstrates forward movement after it is lifted; (5) the mouse demonstrates any movement after it is lifted; (6) the mouse responds to a tail pinch; (7) the mouse has a regular respiratory rate. For each of the 7 different criteria, each mouse was given a sub-score of 0 if it met the criteria or 1 if it did not. After each of the 7 criteria were evaluated, the sub-scores were summed for each mouse and then averaged for each group. For example, if a mouse was bright, alert, and responsive 3 hours after the 300 μg ICV dose, and met all other criteria, it would get a summed score of 0. If another mouse was not bright, alert, and responsive 3 hours after the 300 μg ICV dose but met all other criteria, it would receive a score of 1. Saline treated mice generally receive a score of 0. A score of at the top end of the range would be suggestive of acute toxicity. In the table below, a subscript ‘k’ indicates an (S)-cEt modification; a subscript′e′ indicates a MOE modification; a subscript indicates a 2′-deoxynucleoside and an “N” without a subscript also indicates a 2′-deoxynucleoside. In the table below, an “x” represents a 2-thiothymine. Subscripts “s” and “o” refer to phosphorothioate and phosphodiester internucleoside bonds, respectively.

Each mouse was then evaluated weekly by a trained observer for 8 weeks and examined for adverse events. Adverse events are defined as any behavior not typical in a naive matched control animal. Animals were evaluated for adverse events including, but not limited to: limb clasping, abnormal limb splay, abnormal gait, tremors, abnormal respiration, paralysis, spasticity, impaired righting reflex, hyperactivity and lethargy. For each group, the number of animals that exhibited any adverse events during any of the 8 weekly observations was calculated. For example, a group of animals where no animals exhibited any adverse events is given a score of 0.

TABLE 28 300 μg ICV Bolus 8 Week Study With Mice # of Mice in group with Score at one or more Mut Wt 3 hours adverse Isis IC₅₀ IC₅₀ post events for No. SNP (μM) (μM) injection 8 weeks 540083 rs7685686 ND ND ND 4 540094 rs7685686 0.31 4.8 4.3 2 540095 rs7685686 0.69 8.3 6 4 540096 rs7685686 0.65 10 3.5 2 540108 rs7685686 0.41 >10 0.8 4 550913 rs7685686 0.12 0.6 2 3 551429 rs7685686 0.24 >10 0.3 0 566267 rs7685686 0.34 >15 1.5 0 568876 rs7685686 0.1 >10 1.3 4 571036 rs7685686 0.17 >10 1 4 571037 rs7685686 0.11 >10 0 4 575007 rs7685686 0.67 >10 1.8 0 585246 rs7685686 0.6 >10 4.5 4 571069 rs7685686 0.29 >10 0 4 572771 rs7685686 0.54 >10 0 3 572772 rs7685686 0.57 >10 0 0 575008 rs7685686 0.18 >10 0 1 460209 rs7685686 0.34 1.7 1.3 0 476333 rs7685686 0.32 1.6 0 1 540108 rs7685686 0.41 >10 0.3 2 593199 rs7685686 ND ND 0 3 593200 rs7685686 ND ND 0.5 0 593201 rs7685686 ND ND 0 4 593202 rs7685686 ND ND 0 4 593203 rs7685686 ND ND 0 3 593204 rs7685686 ND ND 0 4 558257 rs7685686 0.6 >10 0 ND 571039 rs7685686 0.34 >10 2.5 ND 598229 rs7685686 ND ND 0 ND 598300 rs7685686 ND ND 1.3 ND 598301 rs7685686 ND ND 2.3 ND 598302 rs7685686 ND ND 0.3 ND 598303 rs7685686 ND ND 1.5 ND 598304 rs7685686 ND ND 1.5 ND 598305 rs7685686 ND ND 0 ND 598306 rs7685686 ND ND 0.5 ND 598307 rs7685686 ND ND 0.8 ND 598308 rs7685686 ND ND 1.8 ND 606560 rs7685686 ND ND 1.5 ND 606578 rs7685686 ND ND 2.8 ND 435871 rs363088 ND ND 4.8 3 525366 rs363088 0.6 2.88 ND 4 525368 rs363088 0.8 6.88 .3 4 575172 rs363088 0.9 5.0 0 4 575175 rs363088 0.4 2.64 0 4 582658 rs363088 0.8 6.9 0 4 582661 rs363088 0.4 3.0 0 4 589595 rs363088 1.2 9.6 0 4 589596 rs363088 1.4 >10 0 4 591416 rs363088 ND ND 0 3 589450 rs6446723 1.3 >10 3.8 0 589532 rs363064 2.5 >10 5.8 2 589537 rs7685686 0.8 4.8 2.8 2 589546 rs6446723 1.3 >10 1.8 0 589547 rs6446723 1.5 >10 2.3 1 589567 rs6446723 0.8 9.6 6 3 589601 rs362273 1.3 7 6 4 589602 rs362273 1.4 >10 6 3 589645 rs363088 1.5 >10 5.7 2 589646 rs363088 3.2 >10 4.3 0 589718 rs6446723 1.4 >10 3.3 1 589737 rs363088 1.3 4.8 5.8 4 556845 rs7685686 ND ND 3 ND 598309 rs7685686 ND ND 0.5 ND 598310 rs7685686 ND ND 0.3 ND 606561 rs7685686 ND ND 1.5 ND 606562 rs7685686 ND ND 2.3 ND 598299 rs7685686 ND ND 1 ND

Example 5: 300 μg ICV Bolus Study with Mice

Additional oligonucleotides, shown in the table below, were administered to mice at a single 300 μg ICV dose. The mice were evaluated according to the procedures in Example 4 above.

TABLE 29 300 μg ICV Bolus Study With Mice Score at 3 hours SEQ post ID ISIS NO. SNP Sequence (5′ to 3′) Sugar Motif injection NO 551429 rs7685686 T_(e)A_(e)A_(e)A_(k)T_(k)TGTCATCA_(k)C_(k)C_(e) 5-7-3 .3 3 571037 rs7685686 A_(e)T_(e)A_(e)A_(e)A_(k)T_(k)TGT ^(m)CAT^(m)CA_(k) ^(m)C_(e) ^(m)C_(k)A_(e) 6-7-4 0 11 540108 rs7685686 A_(e)T_(e)A_(e)A_(k)A_(k)TTGT ^(m)CAT^(m)C_(k)A_(k) ^(m)C_(e) ^(m)C_(e)A_(e) 5-7-5 .3 11 571036 rs7685686 A_(e)T_(k)A_(e)A_(k)A_(e)T_(k)TGT ^(m)CAT^(m)CA_(k) ^(m)C_(e) ^(m)C_(k)A_(e) 6-7-4 1 11 568876 rs7685686 A_(k)T_(k)A_(k)A_(k)A_(k)TTGTCATC_(k)A_(k)C_(k)C_(k)A_(k) 5-7-5 1.3 11 566267 rs7685686 T_(e)A_(k)A_(k)AT_(z)TGT ^(m)CAT^(m)CA_(k) ^(m)C_(k) ^(m)C_(e) 3-9-3 or 5-7-3 1.5 3 575007 rs7685686 T_(e)A_(k)A_(k)AT_(k)TGT ^(m)CAT^(m)CA_(k) ^(m)C_(k) ^(m)C_(e) 3-9-3 or 5-7-3 1.8 3 550913 rs7685686 A_(k)A_(k) T_(e)A_(k)A_(k)ATTGTCATCA_(k)C_(k)C_(e) T_(k)T_(k) 5-9-5 2 12 540096 rs7685686 A_(e)A_(k)TTGTCATCAC_(k)C_(k)A_(k)G_(e) 2-9-4 3.5 7 585246 rs7685686 T_(e)A_(e)A_(e)A_(k)T_(k)TGTCATCA_(k)C_(k)C_(e)A_(e)G_(e) 5-7-5 4.5 31 540094 rs7685686 T_(e)T_(k)GT ^(m)CAT^(m)CA ^(m)C^(m)CA_(k)G_(k)A_(k)A_(e) 2-9-4 4.3 8 540095 rs7685686 A_(e)T_(k)TGTCATCACC_(k)A_(k)G_(k)A_(e) 2-9-4 6 48 540083 rs7685686 A_(e)A_(k)T_(k)T_(k)GTCATCACCA_(k)G_(e) 4-9-2 ND 7 593200 rs7685686 A_(es) T_(ks) T_(ds) G_(ds) T _(ds) mCA_(ds) T_(ds) mC_(ds) A_(ds) mC_(ds) 2-9-4 0.5 48 mC_(ko) A_(ko) G_(ks) A_(e) 593202 rs7685686 A_(es) T_(ko) A_(ko) A_(ko) A_(ks) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) 6-7-4 0 4 T_(ds) mC_(ds) A_(ko) mC_(ko) mC_(ks) A_(e) 476333 rs7685686 A_(es) T_(ks) A_(es) A_(ks) A_(ds) T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) 4-9-4 0 4 mC_(ds) A_(ks) mC_(es) mC_(ks) A_(e) 571039 rs7685686 A_(es) T_(ks) A_(es) A_(ks) A_(ds) xT_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) 4-9-4 2.5 4 T_(ds) mC_(ds) A_(ks) mC_(es) mC_(ks) A_(e) 598229 rs7685686 A_(es) T_(es) A_(es) A_(es) A_(ks) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ks) A_(ds) 6-7-4 0 4 T_(ds) mC_(ds) A_(ks) mC_(es) mC_(ks) A_(e) 593203 rs7685686 T_(ks) A_(ko) A_(ko) A_(ko) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) 5-7-5 0 31 mC_(ds) A_(ko) mC_(ko) mC_(ko) A_(ks) G_(k) 593204 rs7685686 A_(ks) T_(ko) A_(ko) A_(ko) A_(ko) T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) 5-7-5 0 4 T_(ds) mC_(ko) A_(ko) mC_(ko) mC_(ko) A_(k) 598305 rs7685686 A_(es) T_(es) A_(es) A_(es) A_(ds) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) 4-9-4 or 0 4 mC_(ds) A_(ks) mC_(ks) mC_(es) A_(e) 6-7-4 598306 rs7685686 A_(es) T_(es) A_(es) A_(es) A_(ds) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) 4-9-4 or 0.5 4 mC_(ds) A_(ks) mC_(es) mC_(es) A_(e) 6-7-4 598307 rs7685686 A_(es) T_(es) A_(es) A_(es) A_(ds) T_(ks) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) T_(ds) 4-9-4 or 0.8 4 mC_(ds) A_(es) mC_(es) mC_(es) A_(e) 6-7-4 606560 rs7685686 A_(es) T_(es) A_(es) A_(ks) A_(ds) xT_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) A_(ds) 4-9-4 1.5 4 T_(ds) mC_(ds) A_(ks) mC_(es) mC_(ks) A_(e) 606561 rs7685686 A_(es) T_(ks) A_(es) A_(ks) A_(ds) xT_(ds) T_(ds) G_(ds) T_(ds) mC_(ds) A_(ds) 4-9-4 1.5 4 T_(ds) mC_(ds) A_(ks) mC_(es) mC_(es) A_(e) 606562 rs7685686 A_(es) T_(es) A_(es) A_(ks) A_(ds) xT_(ds) T_(ds) G_(ds) T_(ds) mC_(ds) A_(ds) 4-9-4 2.3 4 T_(ds) mC_(ds) A_(ks) mC_(es) mC_(es) A_(e) 606578 rs7685686 A_(es) T_(ks) A_(es) A_(ks) A_(ds) T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) A_(fs) T_(ds) 4-9-4 2.8 4 mC_(ds) A_(ks) mC_(es) mC_(ks) A_(e) 617107 rs363064 A_(es)A_(eo) T_(ko) A_(ks) mC_(ds) G _(ds) G_(ds) G_(ds) T_(ds) A_(ds) A_(ds) 4-8-5 1.25 108 mC_(ds) A_(ko) T_(ko) T_(es) T_(es) T_(e) 617110 rs363064 G_(es) A_(es) A_(eo) T_(ko) A_(ks) mC_(ds) G _(ds) G_(ds) G_(ds) T_(ds) A_(ds) 5-7-5 1.75 89 A_(ds) mC_(ko) T_(ko) T_(es) T_(es) T_(e)

Example 6: Modified Oligonucleotides Targeting HTT SNP rs7685686 or rs6446723

The modified oligonucleotides described in the previous examples were tested in vitro targeting HTT SNP rs7685686 or rs6446723. Human patient fibroblasts GM04022 cell line was used. Cultured GM04022 cells at a density of 35,000 cells per well were transfected using electroporation at 130V with 0.37, 1.1, 3.3 and 10 μM concentrations of modified oligonucleotides. After a treatment period of approximately 24 hours, RNA was isolated from the cells and mRNA levels were measured by quantitative real-time PCR using ABI assay C_2229297_10 which measures at dbSNP rs362303. The HTT mRNA levels were adjusted according to total RNA content, as measured by RIBOGREEN and the results are presented in Table 30.

The IC₅₀ of each modified oligonucleotide is presented in the table below and was calculated by plotting the concentrations of oligonucleotides used versus the percent inhibition of HTT mRNA expression achieved at each concentration, and noting the concentration of oligonucleotide at which 50% inhibition of HTT mRNA expression was achieved compared to the control. The IC₅₀ at which each oligonucleotide inhibits the mutant HTT mRNA expression is denoted as ‘mut IC₅₀’. The IC₅₀ at which each oligonucleotide inhibits the wild-type HTT mRNA expression is denoted as ‘wt IC₅₀’. Selectivity was calculated by dividing the IC₅₀ for inhibition of the wild-type HTT versus the IC₅₀ for inhibiting expression of the mutant HTT mRNA.

ISIS 141923 (C_(e)C_(e)T_(e)T_(e)C_(e)CCTGAAGGTTC_(e)C_(e)T_(e)C_(e)C_(e), 5-10-5 MOE (SEQ ID NO: 575)) was included in the study as a negative control and is denoted as “neg control”. A non-allele specific antisense oligonucleotide, ISIS 387916 (T_(e)C_(e)T_(e)C_(e)T_(e)ATTGCACATTC_(e)C_(e)A_(e)A_(e)G_(e), 5-10-5 MOE (SEQ ID NO: 576)) was used as a positive control and is denoted as “pos control”. ISIS 460209 or 572772 was also included in the study for comparison.

TABLE 30 Modified oligonucleotides targeting Huntingtin (HTT) SNP rs7685686 or rs6446723 IC₅₀ (μM) Selectivity SEQ ID. Isis No. SNP Mut Wt (wt vs mut) Motif NO. 460209¹ rs7685686 <0.4 2.25 5.6 ekk-d9-kke 3 572772² rs7685686 0.27 >10 >37 eeeekk-d7-kke 24 551429 rs7685686 <0.4 >10 >25 eeekk-d7-kke 13 556845 rs7685686 <0.4 >10 >25 ekk-d9-kke 14 617425 rs7685686 1.3 >10 >8 eeeeek-d7-eee 75 617115 rs7685686 <0.4 >10 >25 eeeeek-d7-kke 70 617116 rs7685686 <0.4 >10 >25 eeeekk-d7-kee 71 617117 rs7685686 0.7 >10 >14 eeeeek-d7-kee 72 617118 rs7685686 0.4 >10 >25 eeeeek-d7-kee 73 617119 rs7685686 0.8 >10 >13 eeeeek-d7-eee 74 617111 rs7685686 <0.4 >10 >25 ekek-d9-keke 91 613581 rs7685686 0.9 >10 >11 eeeeedk-d7-eeeee 76 613582 rs7685686 0.4 >10 >25 eeeeek-d7-eeeeee 77 613583 rs7685686 0.7 >10 >14 eeeek-d7-eeeeeee 78 613584 rs7685686 0.4 >10 >25 eeek-d7-eeeeeeee 79 613585 rs7685686 0.4 >10 >25 eek-d7-eeeeeeeee 80 613586 rs7685686 0.7 >10 >14 ek-d7-eeeeeeeeee 81 613588 rs7685686 0.7 >10 >14 eeeeeeek-d7-eeee 82 613589 rs7685686 1.2 >10 >8 eeeeeeeek-d7-eee 83 617105 rs7685686 <0.4 5.9 15 eekk-d8-kkeee 90 606561 rs7685686 <4 >10 25 ekek-d9-keee 67 606562 rs7685686 0.7 >10 25 eeek-d9-keee 68 611714 rs7685686 0.6 4.7 8 eeekk-d7-kke 164 (G) 611715 rs7685686 0.6 5.6 9 ekek-d9-keke 165 (G) 611717 rs7685686 0.8 4.7 6 eeeekk-d7-kke 167 (G) 611718 rs7685686 0.8 7.0 9 ekk-d-k-d7-kke 168 (G) 611719 rs7685686 0.9 3.2 4 ekkkk-d7-kke 169 (G) 611720 rs7685686 <0.4 2.5 6 ek-d9-kkke 170 (G) 611721 rs7685686 0.9 >10 >11 eeeek-d7-keee 171 (G) 611722 rs7685686 1.5 >10 >7 eeee-d-k-d7-keee 172 (G) 611723 rs7685686 2.7 9.6 4 eeeek-d7-keeee 173 (G) 617104 rs6446723 <0.4 6.8 17 eeekk-d7-kkeee 84 617106 rs6446723 <0.4 5.7 14 eekk-d8-kkeee 85 617108 rs6446723 <0.4 5.8 14 ekek-d8-kekee 86 617109 rs6446723 <0.4 3.6 9 eekk-d8-kkeee 87 387916 <0.4 0.6 2 eeeee-d10-eeeee 575 (pos control) 141923 >10 >10 1 eeeee-d10-eeeee 576 (neg control) ¹IC₅₀ measured from average of 2 independent assays ²IC₅₀ measured from average of 3 independent assays

Example 7: Modified Oligonucleotides Targeting HTT SNP rs7685686

The modified oligonucleotides were designed to target SNP positions associated with the HTT gene. In Table 31, the ‘k’ subscript indicates an (S)-cEt modification; ‘e’ subscript indicates MOE modification; the ‘y’ subscript indicates a tricyclo DNA (tcDNA) modification; the ‘z’ subscript indicates a 2′-(ara)-F modification; the ‘f’ subscript indicates a 2′-F modification; ‘m’ before the cytosine residue indicates a 5-methylcytosine; number along with ‘d’ indicates the number of deoxyribose nucleosides; ‘s’ subscript after the nucleoside indicates a phosphorothioate internucleoside linkage. The underlined nucleoside indicates the position on the modified oligonucleotide opposite to the SNP position.

TABLE 31 Modified oligonucleotides targeting HTT SNP rs7685686 SEQ Isis No. SNP Sequence (5′ to 3′) Gap Chemistry Motif ID NO 460209 rs7685686 T_(es) A_(ks) A_(ks) A_(ds) T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) Full deoxy ekk-d9-kke 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) 582670 rs7685686 T_(es) A_(ks) A_(ks) A_(ds) T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) Full deoxy ekk-d7-kkeee 3 A_(ds) T_(ks) mC_(ks) A_(es) mC_(es) mC_(e) 566270 rs7685686 T_(es) A_(ks) A_(ks) A_(ds) T_(zs) T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/2′-(ara)-F ekk-d-z-d7-kke 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) 566271 rs7685686 T_(es) A_(ks) A_(ks) A_(ds) T_(ds) T_(zs) G_(ds) T _(ds) mC_(ds) Deoxy/2′-(ara)-F ekk-d2-z-d6-kke 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) 581400 rs7685686 T_(es) A_(ks) A_(ks) A_(ds) U_(fs) T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/2′-F ekk-d-f-d7-kke 577 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) 581401 rs7685686 T_(es) A_(ks) A_(ks) A_(ds) T_(ds) U_(fs) G_(ds) T _(ds) mC_(ds) Deoxy/2′-F ekk-d2-f-d6-kke 578 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) 539557 rs7685686 T_(es) A_(ks) A_(ks) A_(ds) T_(ds) T_(ds) G_(ds) T_(ys) mC_(ds) Deoxy/Tricyclo ekk-d4-y-d4-kke 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) DNA (tcDNA)

Example 8: Selectivity of Modified Oligonucleotides Targeting HTT SNP rs7685686

Several modified oligonucleotides presented in Table 31 were tested in vitro targeting HTT SNP rs7685686. Heterozygous fibroblast GM04022 cell line was used (from Coriell Institute). Cultured GM04022 cells at a density of 400,000 cells per well were transfected using electroporation (Harvard Apparatus ECM830, 115 V, 6 ms) with 0.06, 0.19, 0.56, 1.7, 5.0 and 15 μM concentrations of ISIS 460209, 566270, 566271, 581400, or 581401 or 0.027, 0.082, 0.25, 0.7, 2.2, 6.7 and 20 μM concentrations of ISIS 582670. Treated cells were maintained at 37° C. and 5% CO₂ in minimal essential medium containing 15% fetal bovine serum, non-essential amino acids and penicillin/streptomycin. Approximately 24 hours post-transfection, the cells were washed with DPBS buffer and lysed. RNA was extracted using the Qiagen RNeasy96 kit and levels of the human HTT mRNA alleles were determined using the qPCR assay C_2231945_10 at SNP rs362331 from Life Technologies. The mutant and wild-type HTT mRNA levels were measured simultaneously by using two different fluorophores, FAM for mutant allele and VIC for wild-type allele. Quantitative RT-PCR reactions were run on the ABI 7900HT instrument using the Quantitect Probe RT-PCR kit following the manufacturer's instructions. The HTT mRNA levels were normalized to total RNA content, as measured by RIBOGREEN. The IC₅₀ and selectivity were calculated using methods described previously in Example 6 and the results are presented in Table 32. ISIS 460209 was included in the study for comparison.

TABLE 32 Selectivity of modified oligonucleotides targeting Huntingtin (HTT) SNP rs7685686 Mut IC₅₀ Selectivity SEQ ID Isis No. SNP (μM) (wt vs mut) Motif No. 460209 rs7685686 0.29 6.9 ekk-d9-kke 3 566270 rs7685686 0.14 7.4 ekk-d7-kkeee 3 566271 rs7685686 0.11 7.1 ekk-d-z-d7-kke 3 581400 rs7685686 0.6 >25 ekk-d2-z-d6-kke 577 581401 rs7685686 0.77 >19 ekk-d-f-d7-kke 3 582670 rs7685686 0.42 >47 ekk-d7-kkeee 3

Example 9: Tm and Selectivity of Modified Oligonucleotide Containing Tricyclo DNA (tcDNA) Modification Targeting HTT SNP rs7685686

ISIS 539557 from Table 31 was tested for thermal stability. Its potency and selectivity targeting HTT SNP rs7685686 were also evaluated in vitro. ISIS 460209 was included in the study for comparison.

Thermal Stability Assay

The T_(m) for ISIS 539557 was measured using the method described herein. The modified oligonucleotide and RNA was mixed in a 1:1 ratio (4 μM duplex) in buffer containing 10 mM phosphate, 100 mM NaCl and 10 mM EDTA at pH 7.0. The duplex was denatured at 85° C. and slowly cooled to the starting temperature of the experiment (15° C.). Thermal denaturation temperatures (T_(m) values) were measured in quartz cuvettes (pathlength 1.0 cm) on a Cary 100 UV/VIS spectrophotometer equipped with a Peltier temperature controller. Absorbance at 260 nm was measured as a function of temperature using a temperature ramp of 0.5° C. per min. T_(m) value was determined using the hyperchromicity method incorporated into the instrument software. The results for T_(m) versus matched and mismatched RNA are presented in Table 33.

Cell Culture, Transfection and Selectivity Analysis

Heterozygous fibroblast GM04022 cell line was used (from Coriell Institute). Cultured GM04022 cells at a density of 400,000 cells per well were transfected using electroporation (Harvard Apparatus ECM830, 115 V, 6 ms) with 2 μM concentrations of ISIS 460209 or 539557. Treated cells were maintained at 37° C. and 5% CO₂ in minimal essential medium containing 15% fetal bovine serum, non-essential amino acids and penicillin/streptomycin. Approximately 24 hours post-transfection, the cells were washed with DPBS buffer and lysed. RNA was extracted using the Qiagen RNeasy96 kit and levels of the human HTT mRNA alleles were determined using the qPCR assay C_2231945_10 at SNP rs362331 from Life Technologies. The mutant and wild-type HTT mRNA levels were measured simultaneously by using two different fluorophores, FAM for mutant allele and VIC for wild-type allele. Quantitative RT-PCR reactions were run on the ABI 7900HT instrument using the Quantitect Probe RT-PCR kit following the manufacturer's instructions. The HTT mRNA levels were normalized to total RNA content, as measured by RIBOGREEN. The percent of HTT mRNA reduction, relative to untreated control levels was measured. The results for selectivity in Table 33 are presented as the ratio of wt HTT/mut HTT mRNA reduction in GM4022 fibroblasts.

TABLE 33 T_(m) and selectivity of ISIS 582670 targeting HTT SNP rs7685686 in GM4022 cells mut T_(m) wt T_(m) Δ T_(m) Ratio SEQ ID Isis No. SNP (° C.) (° C.) mut-wt (wt vs mut) Motif NO 460209 rs7685686 53.7 52.2 1.5 2.6 ekk-d9-kke 3 582670 rs7685686 53.8 51.7 2.1 3.3 ekk-d7-kkeee 3

Example 10: Duration of Action of Modified Oligonucleotides

Mice were given a single ICV injection of modified oligonucleotides targeted to mutant HTT nucleic acid transcripts. The modified oligonucleotides had either 2′-MOE modifications or cEt modifications. After the initial ICV injection, mice from each group were sacrificed at 1, 2, 4, 8, 12, and 16 weeks and the amoung of mutant HTT protein was analyzed. It was found that the modified oligonucleotides having cEt modifications reduced mutant HTT protein for up to 16 weeks after a single ICV dose. It was found that 2′-MOE modified oligonucleotides reduced mutant HTT protein for 4-8 weeks, after which point in time mutant HTT levels began to rise and approach mutant HTT levels found in animals treated with PBS control. This example shows that a single dose of modified oligonucleotides targeted to mutant huntingtin transcript can inhibit mutant HTT protein expression for greater than 16 weeks.

Example 11: Modified Oligonucleotides Targeting HTT SNP rs7685686

The modified oligonucleotides were designed to target SNP positions associated with the HTT gene. In Table 31, the ‘k’ subscript indicates an (5)-cEt modification; ‘e’ subscript indicates MOE modification; the ‘y’ subscript indicates a tricyclo DNA (tcDNA) modification; the ‘z’ subscript indicates a 2′-(ara)-F modification (shown below); the ‘f’ subscript indicates a 2′-F modification in the ribo orientation (shown below); the ‘h’ subscript indicates a F-CeNA modification; ‘m’ before the cytosine residue indicates a 5-methylcytosine; number along with ‘k’ indicates the number of deoxyribose nucleosides; ‘s’ subscript after the nucleoside indicates a phosphorothioate internucleoside linkage; ‘^(s5)’ before a residue indicates an S-5′-Me-DNA modification, e.g. “^(s5)T”; ‘^(r5)’ before a residue indicates an S-5′-Me-DNA modification, e.g. “^(r5)T.” The underlined nucleoside indicates the position on the modified oligonucleotide opposite to the SNP position.

Examples of the 2′-(ribo)-flouro (f), 2′-(ara)-fluor (z), and F-CeNA (h) modifications are provided below:

Examples of R-5′-Me-DNA and S-5′-Me-DNA modifications are provided below:

TABLE 34 Modified oligonucleotides targeting HTT SNP rs7685686 SEQ ID Isis No. SNP Sequence (5′ to 3′) Gap Chemistry Motif NO 460209 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) Full deoxy ekk-d9-kke 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) 582670 rs7685686 T_(es) A_(ks) A_(ks) A_(ds) T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) Full deoxy ekk-d7-kkeee 3 A_(ds) T_(ks) mC_(ks) A_(es) mC_(es) mC_(e) 566270 rs7685686 T_(es) A_(ks) A_(ks) A_(ds) T_(zs) T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/2′-(ara)-F ekk-d-z-d7-kke 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) 566271 rs7685686 T_(es) A_(ks) A_(ks) A_(ds) T_(ds) T_(zs) G_(ds) T _(ds) mC_(ds) Deoxy/2′-(ara)-F ekk-d2-z-d6-kke 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) 581400 rs7685686 T_(es) A_(ks) A_(ks) A_(ds) U_(fs) T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/2′-F ekk-d-f-d7-kke 577 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) 581401 rs7685686 T_(es) A_(ks) A_(ks) A_(ds) T_(ds) U_(fs) G_(ds) T _(ds) mC_(ds) Deoxy/2′-F ekk-d2-f-d6-kke 578 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) 539557 rs7685686 T_(es) A_(ks) A_(ks) A_(ds) T_(ds) T_(ds) G_(ds) T _(ys) mC_(ds) Deoxy/Tricyclo ekk-d4-y-d4-kke 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) DNA (tcDNA) 575837 rs7685686 T_(es) A_(ks) A_(ks) A_(fs)T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/2′-F ekk-f-d8-kke 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) 575831 rs7685686 T_(es) A_(ks) A_(ks) A_(zs)T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/2′-(ara)-F ekk-z-d8-kke 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) XXXX1 rs7685686 T_(es) A_(ks) A_(ks) A_(hs)T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/F-CeNA ekk-h-d8-kke 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) 582981 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(ds) T_(hs) G_(ds) T _(ds) mC_(ds) Deoxy/F-CeNA ekk-d2-h-d6- 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) kke 582980 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(hs) T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/F-CeNA ekk-d-h-d7-kke 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) 575840 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(ds) T_(ds) G_(fs) T _(ds) mC_(ds) Deoxy/2′-F ekk-d3-f-d5- 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) kke 566272 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(ds) T_(ds) G_(zs) T _(ds) mC_(ds) Deoxy/2′-(ara)-F ekk-d3-z-d5- 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) kke XXXX2 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(ds) T_(ds) G_(hs) T _(ds) mC_(ds) Deoxy/F-CeNA ekk-d3-h-d5- 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) kke 586156 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/F-CeNA ekk-d4-h-d4- 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) kke 581402 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(ds) T_(ds) G_(ds) T _(hs) mC_(fs) Deoxy/2′-F ekk-d5-f-d3- 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) kke 566273 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(ds) T_(ds) G_(ds) T _(zs) mC_(ds) Deoxy/2′-(ara)-F ekk-d5-z-d3- 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) kke 582982 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(ds) T_(ds) G_(ds) T _(hs) mC_(ds) Deoxy/F-CeNA ekk-d5-h-d3- 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) kke 575842 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/2′-F ekk-d6-f-d2- 3 A_(fs) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) kke 566274 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/2′-(ara)-F ekk-d6-z-d2- 3 A_(zs) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) kke XXXX3 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/F-CeNA ekk-d6-h-d2- 3 A_(hs) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) kke 581403 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/2′-F ekk-d7-f-d-kke 579 A_(ds) U_(fs) mC_(ds) A_(ks) mC_(ks) mC_(e) 566275 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/2′-(ara)-F ekk-d7-z-d-kke 3 A_(ds) T_(zs) mC_(ds) A_(ks) mC_(ks) mC_(e) 582983 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/F-CeNA ekk-d7-h-d-kke 3 A_(ds) T_(hs) mC_(ds) A_(ks) mC_(ks) mC_(e) 581404 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/2′-F ekk-d8-f-dkke 3 A_(ds) T_(ds) mC_(fs) A_(ks) mC_(ks) mC_(e) 578228 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/2′-(ara)-F ekk-d8-z-kke 3 A_(ds) T_(ds) mC_(zs) A_(ks) mC_(ks) mC_(e) 582984 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/F-CeNA ekk-d8-h-kke 3 A_(ds) T_(ds) mC_(hs) A_(ks) mC_(ks) mC_(e) XXXX4 rs7685686 T_(es) A_(ks) A_(ks) A_(ds) ^(r5)T_(ds) T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/R-5′-Me ekk-d9-kke 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) DNA XXXX5 rs7685686 T_(es) A_(ks) A_(ks) A_(ds) ^(s5)T_(ds)T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/S-5′-Me ekk-d9-kke 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) DNA XXXX6 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(ds) ^(r5)T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/R-5′-Me ekk-d9-kke 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) DNA XXXX7 rs7685686 T_(es) A_(ks) A_(ks) A_(ds)T_(ds) ^(s5)T_(ds) G_(ds) T _(ds) mC_(ds) Deoxy/S-5′-Me ekk-d9-kke 3 A_(ds) T_(ds) mC_(ds) A_(ks) mC_(ks) mC_(e) DNA

Example 12: Selectivity of Modified Oligonucleotides Targeting HTT SNP rs7685686

Several modified oligonucleotides presented in Table 31 were tested in vitro targeting HTT SNP rs7685686. Heterozygous fibroblast GM04022 cell line was used (from Coriell Institute). Cultured GM04022 cells at a density of 400,000 cells per well or 450,000 cells per well were transfected using electroporation (Harvard Apparatus ECM830, 115 V, 6 ms) with 0.06, 0.19, 0.56, 1.7, 5.0 and 15 μM concentrations of the modified oligonucleotides presented in Table 31, except for ISIS 582670, in which concentrations of 0.027, 0.082, 0.25, 0.7, 2.2, 6.7 and 20 μM were used. Treated cells were maintained at 37° C. and 5% CO₂ in minimal essential medium containing 15% fetal bovine serum, non-essential amino acids and penicillin/streptomycin. Approximately 24 hours post-transfection, the cells were washed with DPBS buffer and lysed. RNA was extracted using the Qiagen RNeasy96 kit and levels of the human HTT mRNA alleles were determined using the qPCR assay C_2231945_10 at SNP rs362331 from Life Technologies. The mutant and wild-type HTT mRNA levels were measured simultaneously by using two different fluorophores, FAM for mutant allele and VIC for wild-type allele. Quantitative RT-PCR reactions were run on the ABI 7900HT instrument using the Quantitect Probe RT-PCR kit following the manufacturer's instructions. The HTT mRNA levels were normalized to total RNA content, as measured by RIBOGREEN. The IC₅₀ and selectivity were calculated using methods described previously in Example 6 and the results are presented in Table 32. ISIS 460209 was included in the study for comparison.

In certain embodiments, a modification at position 4 from the 5′-end increases selectivity. In certain embodiments, a modification at position 5 from the 5′-end increases selectivity. In certain embodiments, a modification at position 7 from the 5′-end increases selectivity. In certain embodiments, a modification at position 8 from the 5′-end increases potency and selectivity. In certain embodiments, a modification at position 9 from the 5 ‘-end increases potency. In certain embodiments, a modification at position 10 from the 5’-end increases selectivity. In certain embodiments, a modification at position 11 from the 5′-end increases selectivity. In certain embodiments, a modification at position 12 from the 5′-end increases potency. In certain embodiments, an S-5′-Me-DNA modification increases allele selectivity.

TABLE 35 Selectivity of modified oligonucleotides targeting Huntingtin (HTT) SNP rs7685686 Mut IC₅₀ Selectivity SEQ ID Isis No. SNP (μM) (wt vs mut) Motif No. 460209 rs7685686 .31 9 ekk-d9-kke 3 575837 rs7685686 .28 15 ekk-f-d8-kke 3 575831 rs7685686 .21 19 ekk-z-d8-kke 3 XXXX1 rs7685686 ND ND ekk-h-d8-kke 3 582981 rs7685686 .35 >29 ekk-d2-h-d6-kke 3 582980 rs7685686 .34 7 ekk-d-h-d7-kke 3 575840 rs7685686 .94 >11 ekk-d3-f-d5-kke 3 566272 rs7685686 .07 27 ekk-d3-z-d5-kke 3 XXXX2 rs7685686 ND ND ekk-d3-h-d5-kke 3 586156 rs7685686 .39 5 ekk-d4-h-d4-kke 3 581402 rs7685686 .16 5 ekk-d5-f-d3-kke 3 566273 rs7685686 .09 18 ekk-d5-z-d3-kke 3 582982 rs7685686 .23 13 ekk-d5-h-d3-kke 3 575842 rs7685686 .20 50 ekk-d6-f-d2-kke 3 566274 rs7685686 .20 >50 ekk-d6-z-d2-kke 3 XXXX3 rs7685686 ND ND ekk-d6-h-d2-kke 3 581403 rs7685686 .35 18 ekk-d7-f-d-kke 579 566275 rs7685686 .22 28 ekk-d7-z-d-kke 3 582983 rs7685686 .30 17 ekk-d7-h-d-kke 3 581404 rs7685686 .07 18 ekk-d8-f-dkke 3 578228 rs7685686 .10 32 ekk-d8-z-kke 3 582984 rs7685686 .06 10 ekk-d8-h-kke 3 XXXX4 rs7685686 .15 6.9 ekk-d9-kke 3 XXXX5 rs7685686 .38 16.3 ekk-d9-kke 3 XXXX6 rs7685686 .31 5.7 ekk-d9-kke 3 XXXX7 rs7685686 .40 >38 ekk-d9-kke 3 

1.-40. (canceled)
 41. A compound comprising a modified oligonucleotide consisting of 12 to 30 linked nucleosides, wherein the linked nucleosides comprise at least 8 contiguous nucleobases of a nucleobase sequence recited in SEQ ID NO: 24, 3, 67, 70, 71, 73, 77, 80, 91, or
 577. 42. The compound of claim 41, wherein the nucleobase sequence of the modified oligonucleotide is 100% complementary to SEQ ID NO.
 1. 43. The compound of claim 42, wherein the modified oligonucleotide has the nucleobase sequence recited in SEQ ID NO:
 24. 44. The compound of claim 42, wherein the modified oligonucleotide has the nucleobase sequence recited in SEQ ID NO:
 3. 45. The compound of claim 42, wherein the modified oligonucleotide has the nucleobase sequence recited in SEQ ID NO:
 67. 46. The compound of claim 42, wherein the modified oligonucleotide has the nucleobase sequence recited in SEQ ID NO:
 70. 47. The compound of claim 42, wherein the modified oligonucleotide has the nucleobase sequence recited in SEQ ID NO:
 71. 48. The compound of claim 42, wherein the modified oligonucleotide has the nucleobase sequence recited in SEQ ID NO:
 73. 49. The compound of claim 42, wherein the modified oligonucleotide has the nucleobase sequence recited in SEQ ID NO:
 77. 50. The compound of claim 42, wherein the modified oligonucleotide has the nucleobase sequence recited in SEQ ID NO:
 80. 51. The compound of claim 42, wherein the modified oligonucleotide has the nucleobase sequence recited in SEQ ID NO:
 91. 52. The compound of claim 42, wherein the modified oligonucleotide has the nucleobase sequence recited in SEQ ID NO:
 577. 53. The compound of claim 43, wherein the oligonucleotide has a eeeekk-d7-kke sugar motif.
 54. The compound of claim 44, wherein the oligonucleotide has a sugar motif selected from among: ekk-d-f-kke, ekk-d7-kkeee, ekk-d2-h-d6-kke, ekk-d3-z-d5-kke, ekk-d6-z-d2-kke, ekk-d8-z-kke, or ekk-d9-kke.
 55. The compound of claim 45, wherein the oligonucleotide has a ekek-d9-keee sugar motif.
 56. The compound of claim 46, wherein the oligonucleotide has a eeeeek-d7-kke sugar motif.
 57. The compound of claim 47, wherein the oligonucleotide has a eeeekk-d7-kee sugar motif.
 58. The compound of claim 48, wherein the oligonucleotide has a eeeeek-d7-kee sugar motif.
 59. The compound of claim 49, wherein the oligonucleotide has a eeeeek-d7-eeeeee sugar motif.
 60. The compound of claim 50, wherein the oligonucleotide has a eek-d7-eeeeeeeee sugar motif.
 61. The compound of claim 51, wherein the oligonucleotide has a ekek-d9-keke sugar motif.
 62. The compound of claim 52, wherein the oligonucleotide has a ekk-d2-z-d6-kke sugar motif.
 63. A method of ameliorating a symptom of Huntington's disease, comprising administering an oligomeric compound of claim 41 to an animal in need thereof. 